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Kıran Taşcı E, Karakoyun M, Özdemir Karadaş N, Hekimci Özdemir H, Yılmaz Karapınar D, Karaca C, Çetin F, Aydoğdu S. Aplastic Anemia Frequency and Management in Pediatric Liver Transplantations Due to Non-A-E Hepatitis. Turk J Gastroenterol 2021; 32:313-317. [PMID: 34160361 DOI: 10.5152/tjg.2021.20150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Hepatitis-associated aplastic anemia (HAAA) is a rare complication that presented with bone marrow failure after acute hepatitis. HAAA usually occurs in adolescent men within 1-6 months following hepatitis. Most of HAAA's etiology has non-A-E viral hepatitis. METHODS Our retrospective study included patients with acute fulminant hepatitis who had been treated in Ege University Pediatric Gastroenterology, Hepatology and Nutrition Department and İzmir Kent Hospital Clinical, laboratory, and epidemiological data of the patients were collected from the files. RESULTS In this study, 499 children underwent liver transplantation (LT) in two pediatric transplantation centers. Sixty-eight (13.6%) out of 499 patients, underwent liver transplantation due to fulminant hepatic failure (FHF). Therefore, a total of 64 patients (34 girls, 30 boys) with a diagnosis of FHF have included in the study. Thirty-two (50.0%) of 64 FHF were due to non-A-E hepatitis and 4 out of the 64 patients (6.2%) with FHF developed HAAA. All of the patients received prednisolone as immunosuppression treatment after LT. Three patients were also given Tacrolimus and 1 received an additional mycophenolate mofetil. One of the patients was given prednisolone and cyclosporine treatment without tacrolimus. Bone marrow transplantation was performed in 1 patient (25.0%). Two of the patients received immunosuppressive treatment including rabbit-derived anti-thymocyte globulin, cyclosporine, and initially prednisolone. CONCLUSION In children who underwent liver transplantation for non-A-E FHF are at high risk to develop aplastic anemia. The clinicians should be alert after orthotropic liver transplantation patient could develop aplastic anemia and early treatment with immunosuppressive therapies result in a more successful outcome.
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Affiliation(s)
- Ezgi Kıran Taşcı
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ege University School of Medicine, İzmir, Turkey
| | - Miray Karakoyun
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ege University School of Medicine, İzmir, Turkey
| | - Nihal Özdemir Karadaş
- Department of Pediatric Hematology and Oncology, Ege University School of Medicine, İzmir, Turkey
| | - Hamiyet Hekimci Özdemir
- Department of Pediatric Hematology and Oncology, Ege University School of Medicine, İzmir, Turkey
| | - Deniz Yılmaz Karapınar
- Department of Pediatric Hematology and Oncology, Ege University School of Medicine, İzmir, Turkey
| | - Can Karaca
- Department of Surgery, İzmir Kent Hospital, İzmir, Turkey
| | - Funda Çetin
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ege University School of Medicine, İzmir, Turkey
| | - Sema Aydoğdu
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Ege University School of Medicine, İzmir, Turkey
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Önal U, Metin DY, Karaca C, Hilmioğlu Polat S, Ersin S, Işıkgöz Taşbakan M. Retrospective evaluation of candidemic patients among general surgery department in a tertiary care university hospital. Turk J Surg 2019; 35:210-213. [PMID: 32550330 DOI: 10.5578/turkjsurg.4252] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 10/10/2018] [Indexed: 12/16/2022]
Abstract
Objectives Candida species are among the most important causes of hospital acquired blood borne infections, and with high rates of mortality and morbidity, these infections are still a major problem today. History of gastrointestinal surgery, administration of total parenteral nutrition and/or wide spectrum antibiotics and immune suppression following organ transplantations are considered serious risk factors for these infections. This study aimed to evaluate the patients from our general surgery department with diagnosed candidemia; by means of strain, treatment and prognosis. Material and Methods Patients with positive blood cultures for Candida species who were treated in the wards and Ege University Faculty of Medicine general surgery department of surgical intensive care units of our between 2012 and 2017 were retrospectively analyzed by means of strain, treatment and prognosis. Results A total of 50 patients were enrolled in the study. Mean age was 58.96 years and 54% of the patients were female. There were nine patients with organ transplantation (four liver and five kidney transplantations), six with intestinal perforation and three with anastomotic leakage. Isolated strains were Candida albicans (36%; 18/50), Candida tropicalis (14%; 7/50), Candida glabrata (12%; 6/50), Candida parapsilosis (8%; 4/50), Candida kefyr (6%; 3/50), Candida krusei (4%; 2/50), Candida pulcherrima (2%; 1/50), Cryptococcus neoformans (2%, 1/50), Geotrichum capitatum (2%, 1/50), Candida spp. (unidentified, 14%; 7/50) with decreasing frequency. The highest antifungal sensitivity rates (> 90%) were measured for amphotericin B, voriconazole and echinocandins among all isolates. One-month mortality rate was 43.4% (20/46). Documented eradication was achieved among 24 of the 33 patients who had control blood culture samples (72.7%), and mean eradication time was 7.6 days. Echocardiography was performed in 14% (7/50) and ophthalmic examination in 8% (4/50). Conclusion Although C. albicans appears to be the dominant strain in patients with candidemia, frequencies of other strains are increasing. Early diagnosis and treatment of patients with candidemia is of vital importance due to high mortality and morbidity rates.
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Affiliation(s)
- Uğur Önal
- Department of Infectious Diseases and Clinical Microbiology, Ege University School of Medicine, İzmir, Turkey
| | - Dilek Yeşim Metin
- Department of Medical Microbiology, Ege University School of Medicine, İzmir, Turkey
| | - Can Karaca
- Department of General Surgery, İzmir Economics University School of Medicine, İzmir, Turkey
| | | | - Sinan Ersin
- Department of General Surgery, Ege University School of Medicine, İzmir, Turkey
| | - Meltem Işıkgöz Taşbakan
- Department of Infectious Diseases and Clinical Microbiology, Ege University School of Medicine, İzmir, Turkey
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Iliaz R, Cavus B, Yegen G, Alcin G, Gulluoglu M, Karaca C, Demir K, Besısık F, Kaymakoglu S, Turkmen C, Akyuz F. Should we worry about incidental gastrointestinal tract involvement in positron emission tomography/computed tomography as gastroenterologist? Acta Gastroenterol Belg 2018; 81:471-475. [PMID: 30645914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND AIM Positron emission tomography/computed tomography(PET/CT) scans detects benign clinical conditions in addition to malignancy, and this leads to additional investigation and expenditure. The purpose of our study was to assess the endoscopic and histopathologic results of incidental 18F-FDG uptake in the GI tract. PATIENTS AND METHOD We enrolled 110 patients who underwent gastroscopy/colonoscopy for incidental GI tract involvement in PET/CT. Histopathologic and endoscopic results were compared with FDG uptake level, pattern of uptake(diffuse/focal), and site of involvement. RESULTS In our study, 52.7% of the patients were male and the mean age was 57±11 years. Among the participants, 47.3% and 52.7% of patients had upper GI tract and colorectal involvement in PET/CT, respectively. Gastritis and colonic polyps were the most common endoscopic diagnoses that caused FDG uptake in the upper and lower GI tract, respectively. Endoscopic evaluation was normal in 23.6% of patients with pathologic FDG involvement. The rates of adenomatous polyps, malignancy, and hyperplastic polyps were 18.5%, 13.6%, and 6.8%, respectively. The mean SUVmax were higher in malignant lesions than in non-malignant lesions (14.3±8.9 vs. 9.3±5.3)(p=0.02). Diffuse or focal FDG involvement patterns on PET/CT did not help to discriminate malignancy in the GI tract. CONCLUSION Malignancy was detected in only 13.6% of patients with FDG involvement in the GI tract, and the involvement pattern(diffuse/focal) and SUVmax did not differentiate malignancy.
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Affiliation(s)
- R Iliaz
- Biruni University Medical Faculty, Department of Gastroenterology
| | - B Cavus
- Istanbul University, Istanbul Medical Faculty, Department of Gastroenterology
| | - G Yegen
- Istanbul University, Istanbul Medical Faculty, Department of Pathology
| | - G Alcin
- Karadeniz Technical University, Department of Nuclear Medicine
| | - M Gulluoglu
- Istanbul University, Istanbul Medical Faculty, Department of Pathology
| | - C Karaca
- Istanbul University, Istanbul Medical Faculty, Department of Gastroenterology
| | - K Demir
- Istanbul University, Istanbul Medical Faculty, Department of Gastroenterology
| | - F Besısık
- Istanbul University, Istanbul Medical Faculty, Department of Gastroenterology
| | - S Kaymakoglu
- Istanbul University, Istanbul Medical Faculty, Department of Gastroenterology
| | - C Turkmen
- Istanbul University, Istanbul Medical Faculty, Department of Nuclear Medicine
| | - F Akyuz
- Istanbul University, Istanbul Medical Faculty, Department of Gastroenterology
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Abstract
BACKGROUND AND AIMS The reconstruction of the lower lip defects which may result from malignancy, trauma, and burn is necessary for mastication, oral competence, salivary retain, articulation, and aesthetic appearance of the face. While small (30% of the lower lip) and medium (30%-80% of the lower lip) size defects are reconstructed using primary repair and local flaps, reconstruction of the large defects including total and near-total of the lower lip is very challenging entity. We introduce a new modification of the fan flap named extended fan flap for reconstruction of the total and near-total lower lip defects. MATERIAL AND METHODS The extended fan flap was used for 12 patients with defects involving more than 80% of the lower lip due to squamous cell carcinoma excision. Most of the patients were males (80.9%) with an average age of 66.8 years (range, 47-82 years). RESULTS No major complication is observed in the postoperative period. The functional and aesthetic results were satisfactory. The sphincter function for normal mastication, eating, and salivary retain was reestablished. No microstomy was seen and insertion of artificial dentition was possible for patients. CONCLUSION We believe that the unilateral extended fan flap is a reliable and safe option with satisfactory functional and aesthetic results for total and near-total (more than 80%) lower lip defects.
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Affiliation(s)
- C Demirdover
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - H Vayvada
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - F A Ozturk
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - H S Yazgan
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
| | - C Karaca
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
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Karaca C, Sözen S, Orhon D, Okutan H. High temperature pyrolysis of sewage sludge as a sustainable process for energy recovery. Waste Manag 2018; 78:217-226. [PMID: 32559907 DOI: 10.1016/j.wasman.2018.05.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 05/14/2018] [Accepted: 05/18/2018] [Indexed: 06/11/2023]
Abstract
This study explored the potential of high temperature pyrolysis for energy recovery from domestic sewage. It mainly defines optimum operating conditions to maximize syngas generation. A pyrolysis unit was operated in batch mode, at temperatures of 450, 600 and 850 °C, rotation speeds of 10, 40 and 60 Hz. The sludge had 6% moisture content; it contained 65% organic matter and involved a low calorific value of 13.535 kJ/kg dry matter. Pyrolysis at 850 °C and high rotation speed of 60 Hz yielded the highest conversion of sludge to syngas, with an average of 59% of the organic matter as syngas, 29% as tar and 12% as biochar. Pyrolysis enabled 74% of the energy recovery as syngas and tar. Continuous full-scale pyrolysis systems would further increase the syngas by recovering condensable gaseous products and/or recycling tar back into the pyrolysis unit. A unified approach for energy recovery management should equally consider what fraction of the energy contained in the wastewater was consumed and wasted before generating the sludge. Therefore, the adopted management scheme should also cover all design and operation parameters of the treatment plant, because this is how the energy is best conserved even before the sludge is generated.
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Affiliation(s)
- C Karaca
- ENVIS Energy and Environmental Systems R&D Ltd, ITU Arı Teknokent, Arı-1 Building No. 16, 34469 Maslak, Istanbul, Turkey
| | - S Sözen
- ENVIS Energy and Environmental Systems R&D Ltd, ITU Arı Teknokent, Arı-1 Building No. 16, 34469 Maslak, Istanbul, Turkey; Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey.
| | - D Orhon
- ENVIS Energy and Environmental Systems R&D Ltd, ITU Arı Teknokent, Arı-1 Building No. 16, 34469 Maslak, Istanbul, Turkey; Civil Engineering Department, Near East University, Nicosia, North Cyprus
| | - H Okutan
- Faculty of Chemical and Metallurgical Engineering, Chemical Engineering Processing Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
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Karaca C, Dere KA, Er N, Aktas A, Tosun E, Koseoglu OT, Usubutun A. Recurrence rate of odontogenic keratocyst treated by enucleation and peripheral ostectomy: Retrospective case series with up to 12 years of follow-up. Med Oral Patol Oral Cir Bucal 2018; 23:e443-e448. [PMID: 29924761 PMCID: PMC6051675 DOI: 10.4317/medoral.22366] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 06/20/2018] [Indexed: 11/23/2022] Open
Abstract
Background Odontogenic keratocysts have been reported with high recurrence rates in the literature so various treatment modalities from simple enucleation to resection have been performed to achieve the cure. The purpose of this retrospective study was to investigate the recurrence rate of odontogenic keratocysts (OKCs) treated by enucleation and peripheral ostectomy. Material and Methods An electronic search of the database of the Hacettepe University, Faculty of Medicine, Department of Pathology, was undertaken to identify patients histologically diagnosed with OKCs treated at Department of Oral and Maxillofacial Surgery between 2001 and 2015. Results In total, 81 patients were studied. The mean age at the time of diagnosis was 42 years, and the male:female ratio was 1:0.7. OKCs were located primarily in the posterior mandibular region (41%). Twenty-seven patients were re-examined to determine the recurrence rate. The mean follow-up period was 5 years (range, 1–12 years). The recurrence rate was 14.8%. The relationship between location of the lesion and recurrence was not statistically significant (p = 0.559). There was also no statistically significant relation between the recurrence rate and treatment option of teeth involved in the lesion (p = 0.579). Conclusions The authors conclude that treatment of OKCs by enucleation with peripheral ostectomy is associated with minimal morbidity and is preferred over other aggressive treatment modalities. Meticulous radiographic examination and careful surgical resection may decrease the recurrence rate of OKCs. Key words:Odontogenic keratocyst, recurrence rate, enucleation, enucleation plus peripheral ostectomy.
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Affiliation(s)
- C Karaca
- Hacettepe University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Ankara, Turkey,
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Karaca C, Yilmaz C, Ferecov R, Iakobadze Z, Kilic K, Caglayan L, Aydogdu S, Kilic M. Living-Donor Liver Transplantation for Budd-Chiari Syndrome: Case Series. Transplant Proc 2018; 49:1841-1847. [PMID: 28923635 DOI: 10.1016/j.transproceed.2017.04.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/08/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Venous reconstruction in living-donor liver transplantation for Budd-Chiari syndrome (BCS) has challenges because the grafts from living donors lack vena cava, and hepatic venous anastomosis must be performed on an already-thrombosed and/or stenosed inferior vena cava. Several techniques are described to overcome this problem, and we represent our experience with 22 patients. METHODS Medical recordings of 22 patients were retrospectively collected, and disease-specific data as well as recordings about surgical technique were analyzed. RESULTS Creation of a wide, triangular de novo orifice was the main method used for venous drainage, which was used in 19 patients. The remaining 3 patients had totally thrombosed vena cava; thus, direct anastomosis to the supra-hepatic portion of the vena cava was used in 2 patients and an anastomosis to the right atrium was used in 1 patient. CONCLUSIONS Venous reconstruction in BCS can be achieved without the use of patch-plasty, and the inferior vena cava can be safely resected in selected patients. Living-donor liver transplantation is a feasible option for the treatment of BCS, considering the scarcity of cavaderic donors.
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Affiliation(s)
- C Karaca
- Department of General Surgery, Izmir University of Economics, Faculty of Medicine, Izmir, Turkey
| | - C Yilmaz
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey
| | - R Ferecov
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey
| | - Z Iakobadze
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey
| | - K Kilic
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey
| | - L Caglayan
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey
| | - S Aydogdu
- Department of Pediatrics, Ege University Faculty of Medicine, Izmir, Turkey
| | - M Kilic
- Department of Liver Transplantation, Izmir Kent Hospital, Izmir, Turkey.
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Caliskan C, Karaca C, Ozsoy M, Akgun E, Korkut MA. Unexpected Benefit of the Positron Emission Tomography/Computed Tomography Using 18F-Fluorodeoxyglucose: Report of a Case. Indian J Surg 2016; 78:348-350. [PMID: 27994328 DOI: 10.1007/s12262-016-1477-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Accepted: 03/07/2010] [Indexed: 11/29/2022] Open
Abstract
The positron emission tomography/computed tomography (PET/CT) has been a new tool utilized in the diagnosis and staging of various cancers. However, common worldwide utilization of the PET/CT includes some economic, legal, and ethic controversies. Although PET/CT scanning can detect colorectal premalignant lesions in an early treatable stage, most governments' health care system does not pay for it as a screening test because of its economic burden. Thus, people are forced to make vital decisions about their health because of health policies of their governments. Here, we present an unusual case and discuss the utilization of PET/CT for detection of incidental neoplasms.
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Affiliation(s)
- Cemil Caliskan
- Department of General Surgery, Division of Proctology, Ege University School of Medicine, 35100 Bornova, Izmir, Turkey
| | - Can Karaca
- Department of General Surgery, Ege University School of Medicine, Izmir, Turkey
| | - Mustafa Ozsoy
- Department of General Surgery, Ege University School of Medicine, Izmir, Turkey
| | - Erhan Akgun
- Department of General Surgery, Division of Proctology, Ege University School of Medicine, 35100 Bornova, Izmir, Turkey
| | - Mustafa A Korkut
- Department of General Surgery, Division of Proctology, Ege University School of Medicine, 35100 Bornova, Izmir, Turkey
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Yoldas T, Ustun M, Karaca C, Firat O, Caliskan C, Akgun E, Korkut M. Morgagni Hernia: Is It Just a Congenital Hernia or a Cause of Emergency Surgery? Am Surg 2016; 82:317-319. [PMID: 28206923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Tayfun Yoldas
- Ege University School of Medicine, General Surgery Department, Izmir, Turkey
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Yoldas T, Ustun M, Karaca C, Firat O, Caliskan C, Akgun E, Korkut M. Morgagni Hernia: Is it Just a Congenital Hernia or a Cause of Emergency Surgery? Am Surg 2016. [DOI: 10.1177/000313481608201111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Tayfun Yoldas
- Ege University School of Medicine General Surgery Department Izmir, Turkey
| | - Mehmet Ustun
- Ege University School of Medicine General Surgery Department Izmir, Turkey
| | - Can Karaca
- Ege University School of Medicine General Surgery Department Izmir, Turkey
| | - Ozgur Firat
- Ege University School of Medicine General Surgery Department Izmir, Turkey
| | - Cemil Caliskan
- Ege University School of Medicine General Surgery Department Izmir, Turkey
| | - Erhan Akgun
- Ege University School of Medicine General Surgery Department Izmir, Turkey
| | - Mustafa Korkut
- Ege University School of Medicine General Surgery Department Izmir, Turkey
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Bardak F, Karaca C, Bilgili S, Atac A, Mavis T, Asiri AM, Karabacak M, Kose E. Conformational, electronic, and spectroscopic characterization of isophthalic acid (monomer and dimer structures) experimentally and by DFT. Spectrochim Acta A Mol Biomol Spectrosc 2016; 165:33-46. [PMID: 27107533 DOI: 10.1016/j.saa.2016.03.050] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 03/28/2016] [Accepted: 03/30/2016] [Indexed: 06/05/2023]
Abstract
Isophthalic acid (C6H4(CO2H)2) is a noteworthy organic compound widely used in coating and synthesis of resins and the production of commercially important polymers such as drink plastic bottles. The effects of isophthalic acid (IPA) on human health, toxicology, and biodegradability are the main focus of many researchers. Because structural and spectroscopic investigation of molecules provides a deep understanding of interactional behaviors of compounds, this study stands for exploring those features. Therefore, the spectroscopic, structural, electronic, and thermodynamical properties of IPA were thoroughly studied in this work experimentally using UV-Vis, (1)H and (13)C NMR, FT-IR, FT-Raman and theoretically via DFT and TD-DFT calculations. The UV-Vis absorption spectrum in water was taken in the region 200-400nm. The NMR chemical shifts ((1)H and (13)C) were recorded in DMSO solution. The infrared and Raman spectra of the solid IPA were recorded in the range of 4000-400cm(-1) and 3500-50cm(-1), respectively. DFT and TD-DFT calculations were performed at the level of B3LYP/6-311++G(d,p) in determination of geometrical structure, electronic structure analysis and normal mode. The (13)C and (1)H nuclear magnetic resonance (NMR) spectra were estimated by using the gauge-invariant atomic orbital (GIAO) method. The scaled quantum mechanics (SQM) method was used to determine the total energy distribution (TED) to assign the vibrational modes accurately. Weak interactions such as hydrogen bonding and Van der Walls were analyzed via reduced density gradient (RDG) analysis in monomeric and dimeric forms. Furthermore, the excitation energies, density of state (DOS) diagram, thermodynamical properties, molecular electro-static potential (MEP), and nonlinear optical (NLO) properties were obtained.
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Affiliation(s)
- F Bardak
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - C Karaca
- Experimental Science Applications and Research Center, Celal Bayar University, Manisa, Turkey
| | - S Bilgili
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - A Atac
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - T Mavis
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - A M Asiri
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia; Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M Karabacak
- Departmant of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey
| | - E Kose
- Department of Physics, Celal Bayar University, Manisa, Turkey
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Sözen S, Teksoy Başaran S, Akarsubaşı A, Ergal I, Insel G, Karaca C, Orhon D. Toward a novel membrane process for organic carbon removal-fate of slowly biodegradable substrate in super fast membrane bioreactor. Environ Sci Pollut Res Int 2016; 23:16230-16240. [PMID: 27154840 DOI: 10.1007/s11356-016-6795-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 04/28/2016] [Indexed: 06/05/2023]
Abstract
The study tested the performance of super fast membrane bioreactor (SFMBR) using starch as a slowly biodegradable substrate, exploring the fate of starch, and the response of the microbial community. SFMBR was operated at extremely low sludge ages of 0.5-2.0 days, with a hydraulic retention time of 1.0 h. Average values for permeate chemical oxygen demand (COD) always remained in the narrow range between 14 and 18 mg/L, regardless of the selected mode of MBR operation at different sludge ages. Soluble COD levels in the reactor were consistently higher than the corresponding permeate COD. Parameters defining process kinetics, determined by model calibration of oxygen uptake rate (OUR) profiles, varied as a function of sludge age. Model simulation of SFMBR performance indicated total removal of hydrolysis products so that permeate COD consisted of residual microbial products. PCR-DGGE experiments revealed significant shifts in the composition of the microbial community imposed by variations in the sludge age, reflecting on corresponding process kinetics.
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Affiliation(s)
- S Sözen
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey.
| | - S Teksoy Başaran
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - A Akarsubaşı
- Faculty of Science and Letters, Molecular Biology and Genetics Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - I Ergal
- Faculty of Science and Letters, Molecular Biology and Genetics Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - G Insel
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - C Karaca
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - D Orhon
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
- The Science Academy, 34353, Beşiktaş, Istanbul, Turkey
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Ormeci A, Emrence Z, Baran B, Soyer OM, Gokturk S, Evirgen S, Akyuz F, Karaca C, Besisik F, Kaymakoglu S, Ustek D, Demir K. Can Helicobacter pylori be eradicated with high-dose proton pump inhibitor in extensive metabolizers with the CYP2C19 genotypic polymorphism? Eur Rev Med Pharmacol Sci 2016; 20:1795-1797. [PMID: 27212172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Proton pump inhibitors (PPI) metabolism and pharmacokinetics are regulated by cytochrome P450 enzymes in the liver. Cytochrome P450 2C19 (CYP2C19) polymorphism plays an import role in the metabolism of PPIs. The three possible genotypes for CYP2C19 each has a distinct effect on the pharmacodynamics of PPIs. Homozygote extensive metabolizers (HomEM) are the most frequent genotype and have two wild-types (non-mutant) (*1/*1) alleles. HomEM is associated with increased enzyme activity, which increases the rate of PPI metabolism. Intragastric pH, which is required for eradication, is lowest in HomEM. In HomEMs, an insufficient increase in intragastric pH results in decreased anti-Helicobacter pylori (HP) efficacy of the antibiotics and, therefore, lower eradication rates. We determined whether the HP eradication rate would increase after high-dose PPI treatment of extensive PPI metabolizers who had been treated unsuccessfully with a standard PPI dose. In our report, increasing the PPI dosage in patients with genotype polymorphisms may be effective on eradication rates. Eradication rates are directly affected by CYP2C19 polymorphisms, and eradication treatments should be planned considering such genotypic polymorphisms. Hence, CYP2C19 genotyping prior to treatment may facilitate determination of the optimum PPI dose to improve the therapeutic outcome. However, further researches are required to confirm this hypothesis.
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Affiliation(s)
- A Ormeci
- Department of Internal Medicine, Division of Gastroenterology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.
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Birge O, Arslan D, Kinali E, Karaca C. A rare complication of colporraphy anterior procedure: vesicovaginal fistula due to foreign body. CLIN EXP OBSTET GYN 2016. [DOI: 10.12891/ceog2098.2016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Ormeci AC, Akyuz F, Baran B, Soyer OM, Gokturk S, Onel M, Onel D, Agacfidan A, Demirci M, Yegen G, Gulluoglu M, Karaca C, Demir K, Besisik F, Kaymakoglu S. Steroid-refractory inflammatory bowel disease is a risk factor for CMV infection. Eur Rev Med Pharmacol Sci 2016; 20:858-865. [PMID: 27010142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Patients with inflammatory bowel disease (IBD) show increased the prevalence of cytomegalovirus (CMV) infection due to the severity of the disease and the immunosuppressive treatments they receive. The aim of this study was to determine the prevalence of CMV infection in IBD patients and identify the risk factors for CMV infection with different demographic characteristics in IBD patients. PATIENTS AND METHODS We enrolled 85 patients diagnosed with IBD (43 with ulcerative colitis (UC) and 42 with Crohn's disease (CD)) in this prospective study. The clinical disease activities of UC and CD were assessed using Truelove-Witts and Crohn's disease activity index (CDAI). CMV infection was assessed by detection of DNA using real-time polymerase chain reaction (PCR) in blood samples and quantitative PCR in colonic biopsy specimens and by detection of inclusion bodies using hematoxylin-eosin staining. RESULTS Thirteen patients with IBD exhibited concomitant CMV infection. CMV infection was not detected in any of the patients in remission. Viral loads measured in the colonic mucosa of infected patients ranged from 800-7000 genome copies/mL total extracted DNA. The mean serum CMV DNA level was 1694 ± 910 copies/mL (range: 800-3800). The rate of steroid resistance in CMV-positive cases was significantly higher than that in CMV-negative cases (p = 0.001). CD with acute exacerbation was a risk factor for CMV disease (p = 0.04). All of the CMV-positive patients received immunosuppressive treatments. CONCLUSIONS CMV infection should be suspected in steroid-resistant UC and CD. Antiviral treatment improved the clinical outcome in steroid-resistant IBD cases with serum CMV DNA levels above 1000 copies/mL.
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Affiliation(s)
- A C Ormeci
- Department of Internal Medicine, Division of Gastroenterology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.
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Ormeci A, Emrence Z, Baran B, Gokturk S, Soyer OM, Evirgen S, Akyuz F, Karaca C, Besisik F, Kaymakoglu S, Ustek D, Demir K. Effect of cytochrome P450 2C19 polymorphisms on the Helicobacter pylori eradication rate following two-week triple therapy with pantoprazole or rabeprazole. Eur Rev Med Pharmacol Sci 2016; 20:879-885. [PMID: 27010145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Cytochrome P450 2C19 (CYP2C19) polymorphisms play an important role in the metabolism of proton pump inhibitors. Rabeprazole is primarily metabolized via non-enzymatic pathways. In this study, we determined whether rabeprazole- and pantoprazole-based eradication treatments were influenced by CYP2C19 polymorphisms. PATIENTS AND METHODS A total of 200 patients infected with Helicobacter pylori were treated with either 40 mg of pantoprazole or 20 mg of rabeprazole plus 500 mg of clarithromycin, 1000 mg of amoxicillin twice daily for 2 weeks. CYP2C19 genotype status was determined by Polymerase Chain Reaction (PCR)-restriction-fragment-length polymorphism. The genotypes of cytochrome P450 2C19 were classified as homozigote extensive metabolizer (HomEM), heterozigote metabolizer (HetEM) and poor metabolizer (PM). The CYP2C19 genotype of all patients, the effectiveness of the treatment, the effect of the genotypic polymorphism on the treatment were assessed. RESULTS The frequencies of HotEM, HetEM, PM were 78%, 19.5% and 2.5%, respectively. 48% (n = 96) of the patients received treatment with rabeprazole and 52% (n = 104) with pantoprazole. The eradication rate was 64.7% for HomEM, 79.4% for HetEM, 100% for PM (p = 0.06). In HetEM, PM, are considered as a single group, the eradication rates were higher in patients with the HetEM and PM (HetEM+PM) genotypes than in those with the wild-type genotype (81.8 vs. 64.7% p = 0.031). Among the patients treated with rabeprazole, the eradication rates were significantly lower in those with the HomEM genotype than in those with the HetEM+PM genotypes (60% vs. 85.7% p = 0.023). CONCLUSIONS The genotypic polymorphism is effective on the rate of eradication. Eradication treatment rate with rabeprazole is influenced by CYP2C19 genotype.
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Affiliation(s)
- A Ormeci
- Department of Internal Medicine, Division of Gastroenterohepatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.
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Özkan HS, Irkoren S, Durum Y, Karaca C. A Retrospective 3D Radiologic Analysis of 52 Patients with Mandible Fractures. Facial Plast Surg 2016; 32:105-10. [PMID: 26862971 DOI: 10.1055/s-0036-1571350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
When fractured, mandible angulates. For better preoperative evaluation, movements of fractured mandibular segments should be documented in x-, y-, and z-axes. This article quantitatively evaluates the pattern and degree of the angulation. Fifty-two patients with mandible fractures were involved in this study. After defining a three-dimensional (3D) coordination system consisting of the x-axis (the axis directed from the medial to lateral side of the skull), y-axis (directed from the inferior to superior side), and z-axis (directed from the posterior to anterior side), the degree with which the fractured mandible angulated around each of these axes was measured using 3D graphic software. The tendency of the angulation was compared between the three axes. Frequency of complications, operation times, maxilla mandibular fixation (MMF) need, and epidemiologic data were compared with the angulation results. Angulation around the x-axis was the most frequent with a 55.8% incidence, followed by a substantial margin of angulation around the y-axis with a 21.2% incidence; angulation around the z-axis was rare, with an incidence of 15.4%. Furthermore, the degree of z-axis angulation was minor compared with x- and y-axes angulations. There were statistically increased rate of complications, operation time, and MMF need in patients with more than 10 degrees of angulation in any case. Operation time and complication rates are also increased in patients with internal rotation of the proximal segment. Preoperative evaluation of mandible fracture angulation degree is useful for determining postoperative complication rates, MMF need, and operative challenge. This finding is helpful for effective performance to reposition the fractured mandible.
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Affiliation(s)
- Heval Selman Özkan
- Department of Plastic and Reconstructive Surgery, Adnan Menderes University, Aydin, Turkey
| | - Saime Irkoren
- Department of Plastic and Reconstructive Surgery, Adnan Menderes University, Aydin, Turkey
| | - Yasemin Durum
- Department of Radiology, Adnan Menderes University, Aydin, Turkey
| | - Can Karaca
- Department of Radiology, Adnan Menderes University, Aydin, Turkey
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Birge O, Karaca C, Arslan D, Kinali E. Medical management of cesarean scar pregnancy at advanced age: case report and literature review. CLIN EXP OBSTET GYN 2016. [DOI: 10.12891/ceog2056.2016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Birge Ö, Karaca C, Arslan D, Kinali E. Medical management of cesarean scar pregnancy at advanced age: case report and literature review. CLIN EXP OBSTET GYN 2016; 43:140-142. [PMID: 27048038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIM Cesarean scar pregnancy is a rare condition that is increasing in frequency parallel to the increase in cesarean section rates. The authors hereby discuss a case with cesarean scar pregnancy at advanced age that was treated with methotrexate (MTX) in Nyala Sudan Turkey Training and Research Hospital. CONCLUSION Cesarean scar pregnancy is a rare type of ectopic pregnancy that is increasing in number due to the increase in cesarean deliveries. Clinical vigilance is imperative for diagnosis and treatment of this highly mortal and morbid entity.
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Birge O, Arslan D, Kinali E, Karaca C. A rare complication of colporraphy anterior procedure: vesicovaginal fistula due to foreign body. CLIN EXP OBSTET GYN 2016; 43:297-299. [PMID: 27132435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Iatrogenic vesicovaginal fistula (VVF) is one of the possible complications after gynecologic operations. However, fistula formation owing to a forgotten foreign body is a rare condition. Infectious complications and subsequent vesicovaginal perforation due to foreign body is difficult to diagnose since it is an unlikely condition. Delays in diagnosis and treatment can lead to serious morbidities and even mortality. This paper aims to discuss a VVF case developed after anterior colporraphy owing to forgotten gauze.
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Koklu S, Gulsen MT, Tuna Y, Koklu H, Yuksel O, Demir M, Guner R, Dogan Z, Kucukazman M, Poyrazoglu OK, Biyik M, Ozturk NA, Aydogan T, Coban S, Kocaman O, Sapmaz F, Gokturk SH, Karaca C, Demirezer A, Tanoglu A, Yildirim B, Altinbas A, Atak BM, Cosar AM, Alkan E. Differences in nephrotoxicity risk and renal effects among anti-viral therapies against hepatitis B. Aliment Pharmacol Ther 2015; 41:310-9. [PMID: 25982037 DOI: 10.1111/apt.13036] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 09/03/2014] [Accepted: 11/06/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND Results are conflicting with respect to the renal effects of anti-viral agents used for hepatitis B virus infection. AIM To compare short and long-term renal effects in real-life settings and to determine risk factors for renal impairment during treatment. METHODS 2221 treatment-naïve patients were enrolled. Among these, 895 (302 lamivudine, 27 telbivudine, 282 entecavir, 273 tenofovir and 11 adefovir initiated patients) had 'repeated measures' of creatinine (baseline, 1st, 6th, 12th and 24th month of treatment). Telbivudine and adefovir groups were excluded from further analysis because of the low number of patients. We calculated the glomerular filtration rate (GFR) using the Modification of Diet in Renal Disease (MDRD) formula at each time point. Hypophosphataemia was also recorded. Risk factors for renal impairment were analysed. RESULTS Tenofovir caused a decline in GFR at each time point when compared to baseline levels. However, lamivudine and entecavir did not change GFR. GFR-shifting from ≥90 to 60-89 mL/min/1.73 m(2) was comparable among groups. The proportion of patients whose baseline creatinine increased more than 25% was comparable among all anti-virals. GFR showed a decline in patients who switched from entecavir to tenofovir. One patient with compensated cirrhosis needed to change from tenofovir because of renal safety. Seven and three patients developed transient hypophosphataemia in the tenofovir and lamivudine groups, respectively. CONCLUSIONS Although tenofovir caused a decline in GFR, differences between the anti-viral agents do not appear to be so impressive. In patients with and without renal risk factors at baseline, there is no impact of anti-virals, including tenofovir.
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Affiliation(s)
- S Koklu
- Department of Gastroenterology, Hacettepe University School of Medicine, Ankara, Turkey
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Yoldas T, Karaca C, Unalp O, Ekmekcigil E, Uguz A, Sezer T, Caliskan C, Akgun E, Korkut M. Our 'ligation of intersphincteric fistula tract' experience for complex anorectal fistulas: is it a preferable method? Am Surg 2014; 80:E307-E308. [PMID: 25347487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Affiliation(s)
- Tayfun Yoldas
- Department of General Surgery, Ege University, School of Medicine, Izmir, Turkey
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Yoldas T, Karaca C, Unalp O, Ekmekcigil E, Uguz A, Sezer T, Caliskan C, Akgun E, Korkut M. Our ‘Ligation of Intersphincteric Fistula Tract’ Experience for Complex Anorectal Fistulas: Is it a Preferable Method? Am Surg 2014. [DOI: 10.1177/000313481408001112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Tayfun Yoldas
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Can Karaca
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Omer Unalp
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Ela Ekmekcigil
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Alper Uguz
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Taylan Sezer
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Cemil Caliskan
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Erhan Akgun
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
| | - Mustafa Korkut
- Department of General Surgery Ege University School of Medicine Izmir, Turkey
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Sözen S, Cokgor EU, Insel G, Tas DO, Dulkadiroglu H, Karaca C, Filibeli A, Meric S, Orhon D. Scientific basis of dissolved organic carbon limitation for landfilling of municipal treatment sludge--is it attainable and justifiable? Waste Manag 2014; 34:1657-1666. [PMID: 24973302 DOI: 10.1016/j.wasman.2014.05.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 04/14/2014] [Accepted: 05/24/2014] [Indexed: 06/03/2023]
Abstract
This study evaluated the scientific and technical basis of the dissolved organic carbon (DOC) limitation imposed on municipal sludge for landfilling, mainly for assessing the attainability of the implemented numerical level. For this purpose, related conceptual framework was analyzed, covering related sewage characteristics, soluble microbial products generation, and substrate solubilization and leakage due to hydrolysis. Soluble COD footprint was experimentally established for a selected treatment plant, including all the key steps in the sequence of wastewater treatment and sludge handling. Observed results were compared with reported DOCs in other treatment configurations. None of the leakage tests performed or considered in the study could even come close to the prescribed limitation. All observed results reflected 10-20 fold higher DOC levels than the numerical limit of 800 mg/kg (80 mg/L), providing conclusive evidence that the DOC limitation imposed on municipal treatment sludge for landfilling is not attainable, and therefore not justifiable on the basis of currently available technology.
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Affiliation(s)
- S Sözen
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey; ENVIS Energy and Environmental Systems Ltd., ITU Arı Teknokent, Arı 1 Binası, 16, 34469 Maslak, Istanbul, Turkey.
| | - E Ubay Cokgor
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey.
| | - G Insel
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey.
| | - D Okutman Tas
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey.
| | - H Dulkadiroglu
- ENVIS Energy and Environmental Systems Ltd., ITU Arı Teknokent, Arı 1 Binası, 16, 34469 Maslak, Istanbul, Turkey.
| | - C Karaca
- ENVIS Energy and Environmental Systems Ltd., ITU Arı Teknokent, Arı 1 Binası, 16, 34469 Maslak, Istanbul, Turkey.
| | - A Filibeli
- Engineering Faculty, Environmental Engineering Department, Dokuz Eylul University, 35160 Buca, Izmir, Turkey.
| | - S Meric
- Çorlu Engineering Faculty, Environmental Engineering Department, Namik Kemal University, Çorlu, Tekirday, Turkey.
| | - D Orhon
- Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey; ENVIS Energy and Environmental Systems Ltd., ITU Arı Teknokent, Arı 1 Binası, 16, 34469 Maslak, Istanbul, Turkey.
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Kilinc S, Gurkan U, Guven S, Koyuncu G, Tan S, Karaca C, Ozdogan O, Dogan M, Tugmen C, Pala E, Bayol U, Baran M, Kurtulmus Y, Pirim I, Kebapci E, Demirci U. Evaluation of Epithelial Chimerism After Bone Marrow Mesenchymal Stromal Cell Infusion in Intestinal Transplant Patients. Transplant Proc 2014; 46:2125-32. [DOI: 10.1016/j.transproceed.2014.06.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Yeniay L, Carti E, Karaca C, Zekioglu O, Yararbas U, Yilmaz R, Kapkac M. A new and simple predictive formula for non-sentinel lymph node metastasis in breast cancer patients with positive sentinel lymph nodes, and validation of 3 different nomograms in Turkish breast cancer patients. ACTA ACUST UNITED AC 2014; 7:397-402. [PMID: 24647780 DOI: 10.1159/000338844] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Nomogram accuracies for predicting non-sentinel lymph node (SLN) involvement vary between different patient populations. Our aim is to put these nomograms to test on our patient population and determine our individual predictive parameters affecting SLN and non-SLN involvement. PATIENTS AND METHODS Data from 932 patients was analyzed. Nomogram values were calculated for each patient utilizing MSKCC, Tenon, and MHDF models. Moreover, using our own patient- and tumor-depended parameters, we established a unique predictivity formula for SLN and non-SLN involvement. RESULTS The calculated area under the curve (AUC) values for MSKCC, Tenon, and MHDF models were 0.727 (95% confidence interval (CI) 0.64-0.8), 0.665 (95% CI 0.59-0.73), and 0.696 (95% CI 0.59-0.79), respectively. Cerb-2 positivity (p = 0.004) and size of the metastasis in the lymph node (p = 0.006) were found to correlate with non-SLN involvement in our study group. The AUC value of the predictivity formula established using these parameters was 0.722 (95% CI 0.63-0.81). CONCLUSION The most accurate nomogram for our patient group was the MSKCC nomogram. Our unique predictivity formula proved to be as equally effective and competent as the MSKCC nomogram. However, similar to other nomograms, our predictivity formula requires future validation studies.
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Affiliation(s)
| | - Erdem Carti
- Ege University School of Medicine, Izmir, Turkey
| | - Can Karaca
- Ege University School of Medicine, Izmir, Turkey
| | | | | | - Rasih Yilmaz
- Ege University School of Medicine, Izmir, Turkey
| | - Murat Kapkac
- Ege University School of Medicine, Izmir, Turkey
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Baran B, Gulluoglu M, Soyer OM, Ormeci AC, Gokturk S, Evirgen S, Yesil S, Akyuz F, Karaca C, Demir K, Kaymakoglu S, Besisik F. Treatment failure may lead to accelerated fibrosis progression in patients with chronic hepatitis C. J Viral Hepat 2014; 21:111-20. [PMID: 24383924 DOI: 10.1111/jvh.12127] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 05/01/2013] [Indexed: 01/16/2023]
Abstract
Chronic hepatitis C (CHC) patients with treatment failure (TF) remain at risk of continuing fibrosis progression. However, it has not been investigated whether there is an increased risk of accelerated fibrosis progression after failed interferon-based therapy. We aimed to investigate long-term influence of TF on fibrosis progression compared with untreated patients with CHC. We studied 125 patients with CHC who underwent paired liver biopsies from 1994 to 2012. Patients with advanced fibrosis were excluded from the analysis. Sixty-three patients had TF, and 62 patients were treatment-naïve (TN). Annual fibrosis progression rate (FPR) was calculated, and significant fibrosis progression (SFP) was defined as ≥ 2 stage increase in fibrosis during follow-up. Multiple regression analyses were performed to find out independent predictors of FPR and SFP. Demographic characteristics and duration between paired liver biopsies were similar in TF and TN groups. Baseline alanine aminotransferase and gamma-glutamyl transferase (GGT) levels (71 ± 31 vs 47 ± 22, P < 0.001 and 49 ± 39 vs 36 ± 28, P = 0.027, respectively), baseline mean fibrosis stage (2.2 ± 0.7 vs 1.9 ± 0.7, P = 0.018) and histologic activity index (6.3 ± 1.9 vs 4.3 ± 1.6, P < 0.001) were higher in the TF group compared with the TN group. In regression analyses, the strongest independent predictor of fibrosis progression was the GGT level (OR: 1.03, 95%CI 1.01-1.5, P < 0.001). Treatment experience (OR: 5.97, 95%CI 1.81-19.7, P = 0.003) also appeared as an independent predictor of both FPR and SFP. Failed interferon-based CHC treatment may lead to accelerated FPR in the long-term compared with the natural course.
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Affiliation(s)
- B Baran
- Department of Gastroenterohepatology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
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Sert I, Colak H, Tugmen C, Dogan SM, Karaca C. Anemia in living donor kidney transplantation. Transplant Proc 2013; 45:2238-43. [PMID: 23714109 DOI: 10.1016/j.transproceed.2012.12.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 11/12/2012] [Accepted: 12/03/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUND We evaluated the prevalence of pretransplantation and posttransplantation anemia and its effect on serum creatinine levels among living donor kidney transplant recipients. METHODS We reviewed retrospectively 170 adult patients who underwent living donor kidney transplantation between 1994 and 2009. We defined anemia as hemoglobin (Hb) ≤12 g/dL for women and ≤13 g/dL for men with severe anemia as Hb <11 g/dL for both men and women (World Health Organization criteria). Patients were also categorized according to Hb levels less than or greater than 10 g/dL for correlation with recipient serum creatinine levels at months 1, 3, 6, and 12. RESULTS Mean recipient and donor ages were 33 ± 10 and 45 ± 12 years, respectively. Mean cold ischemia time was 76 ± 43 minutes. At the time of transplantation, anemia and severe anemia prevalences were 86.7% and 58.8%, respectively. Anemia was observed in 64 patients (42.1%) at posttransplantation month 3. Pretransplantation severe anemia was a good predictor of both Hb levels and anemia presence posttransplantation. Pretransplantation anemia and severe anemia caused greater requirements for posttransplantation blood transfusions (P < .05). Younger age and female gender were significant risk factors for severe anemia pretransplantation. There was a significant correlation between posttransplantation Hb levels and serum creatinine levels at 12 month (P = .01). Recipient female gender and longer hospital stay were significant risk factors for both anemia and severe anemia posttransplantation. Higher recipient weight and history of acute rejection episode were also significant for posttransplantation severe anemia. CONCLUSION This study indicated that successful kidney transplantation had a positive effect on Hb levels. Posttransplantation anemia predicted worse graft function in the first month after transplantation.
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Affiliation(s)
- I Sert
- Tepecik Training and Research Hospital, Department of Organ Transplantation, İzmir, Turkey.
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Okamoto S, Sakama T, Nakamura S, Niimura F, Sahin S, Ertan P, Evrengul H, Horasan G, Dede B, Berdeli A, Yildiz N, Cicek Deniz N, Asadov R, Yucelten D, Alpay H, Prado G, Schoeneman M, Mongia A, Paudyal B, Feygina V, Norin A, Hochman D, Tawadrous H, Bansilal V, Topaloglu R, Gulhan B, Bilginer Y, Celebi Tayfur A, Yildiz C, Ozaltin F, Duzova A, Ozen S, Aki T, Besbas N, Komaki F, Hamasaki Y, Ishikura K, Hamada R, Sakai T, Hataya H, Ogata K, Fukuzawa R, Ando T, Honda M, Malke A, Silska-Dittmar M, Soltysiak J, Blumczynski A, Ostalska-Nowicka D, Zachwieja J, Tabel Y, Oncul M, Elmas A, Kavaz A, Ozcakar ZB, Bulum B, Ekim M, Yalcinkaya F, Prikhodina L, Turpitko O, Dlin V, Gheith O, Alotaibi T, Nampoory N, Mosaad A, Halim M, Saied T, Abou Ateya H, Adel H, Mozarei I, Neir P, Hamasaki Y, Uemura O, Ishikura K, Ito S, Wada N, Hattori M, Ohashi Y, Tanaka R, Nakanishi K, Kaneko T, Honda M, Golovachova V, Odinets Y, Laszki-Szczachor K, Polak-Jonkisz D, Sobieszczanska M, Rusiecki L, Zwolinska D, Ninchoji T, Kaitoh H, Matsunoshita N, Nozu K, Nakanishi K, Yoshikawa N, Iijima K, Maglalang-Reed OM, Elises JS, Zamora MNV, Pasco P, Arejola-Tan A, Alparslan C, Dogan SM, Kose E, Elmas C, Kilinc S, Arslan N, Kebabci E, Karaca C, Yavascan O, Aksu N, Minson S, Munoz M, Vergara I, Mraz M, Vaughan R, Rees L, Olsburgh J, Calder F, Shroff R, Zaicova N, Kavaz A, Ozcakar ZB, Bulum B, Ekim M, Yalcinkaya F, Lavrenchuk O, Viktoria D, Savchenko V, Bagdasarova I, Doyon A, Bayazit A, Canpolat N, Duzova A, Kracht D, Litwin M, Ranchin B, Shroff R, Sozeri B, Wuhl E, Zeller R, Melk A, Querfeld U, Schaefer F, Sinha MD, Turner C, Booth CJ, Goldsmith DJA, Simpson JM. Paediatric nephrology - A. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Vayvada H, Demirdover C, Menderes A, Yilmaz M, Karaca C. The Functional Results of Acute Nerve Grafting in Traumatic Sciatic Nerve Injuries. ULUS TRAVMA ACIL CER 2013; 19:109-14. [DOI: 10.5505/tjtes.2013.33279] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Vayvada H, Demirdover C, Menderes A, Karaca C. Necrotising fasciitis in the central part of the body: diagnosis, management and review of the literature. Int Wound J 2012; 10:466-72. [PMID: 22694053 DOI: 10.1111/j.1742-481x.2012.01006.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Necrotising fasciitis (NF) is characterised by rapidly spreading necrosis of the soft tissue and fascia. It is rare but can be fatal when not managed properly. The aim of this study is to evaluate the diagnosis, treatment and results such as mortality, morbidity and reconstructive options of NF localised in the central part of the body. The main goal is to emphasise upon the clinical symptoms for early diagnosis which is the most important factor in saving the lives of these patients. Between January 2000 and December 2010, 30 patients with NF localised in central parts of the body were treated. Six of the patients were female (20%) and the others were male (80%). The mean age was 54·03 years (ranged between 26 and 83 years). The average time from the onset of symptoms to diagnosis was 6 days, ranging from 2 to 11 days. The localisation of NF was perineum in 24 patients (80%); inguinal and thigh region in 5 patients (16·7); and back in 1 patient (3·3%). The hospitalisation time was varying between 17 and 32 days (mean 23 days). Six patients (20%) died and 24 patients (80%) survived. All non-survivors had risk factors and secondary comorbidities such as immunosuppression, chronic cardiac failure, and diabetes with high glucose level. Survivors also underwent repeated debridement operation 2-4 times. Reconstructive procedures were split-thickness skin graft (STSG) in eight patients (33·3%), fasciocutaneous flaps in four patients (16·6%), fasciocutaneous flap + STSG in six patients (25%), scrotal flap + STSG in two patients (6·6%), scrotal flap in two patients (6·6%) and musculocutaneous flap + STSG in one patient (3·3%). There was no major complication such as flap and graft loss, after reconstructive procedures. Early diagnosis of NF may be the lifesaving factor. Amuputation can save the patient's life in the case of NF in the extremities; however, this is not an option for NF in central parts of the body. In these cases, when NF is suspected, early debridement of necrotic tissues should be performed. As soon as the infection and the spread of the necrosis are controlled, reconstruction should be considered.
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Affiliation(s)
- Haluk Vayvada
- Plastic and Reconstructive Surgery, Dokuz Eylul University, Faculty of Medical, İnciraltı, Izmir, Turkey.
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Vayvada H, Demirdover C, Menderes A, Karaca C. Necrotizing fasciitis: Diagnosis Treatment and Review of the Literature. ULUS TRAVMA ACIL CER 2012; 18:507-13. [DOI: 10.5505/tjtes.2012.97523] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Senel BN, Yetmen O, Guzel E, Karaca C, Coban I, Elicin O, Suzer O. P3-13-10: Does Lapatinip Increase Pulmonary Toxicity When Concurrently Used with Radiation Therapy? An Experimental Study with Wistar-Albino Rats. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-p3-13-10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: Lapatinib (L) is an oral receptor tyrosine kinase inhibitor which has shown activity in the treatment of metastatic breast cancer. Adjuvant usage of L is being investigated in clinical phase III trials. There is no data regarding the side effects of combination of RT and L which may be a problem when L is used in the adjuvant setting. Lung is the most radiosensitive organ to observe late effects of RT. We evaluated if concurrent administration of L has any impact for the development of radiation induced pulmonary fibrosis in rats (RIPF). Material Methods: 40 female Wistar-albino rats (WAR) were divided into 4 experimental groups (G). G1 (control) did not receive any treatment. G2 (RT) received RT to whole thoracic region. G3 (L) received L without RT. G4 (L+RT) received L with RT. A total dose of 30 Gy in 10 fractions was given to both lungs with an anterior field at 2 cm depth. L equivalent to 1500 mg/day, 60 kg adult dose, were calculated according to the mean weight of rats, orally administrated with a feeding tube twice daily including the week-ends until WAR were sacrificed. WAR were anesthetized and sacrificed 16 weeks after RT which was shown to be a sufficient period for the development of RIPF in rats. Paraffin sections (5 μm thick) of lungs were stained with hematoxylin-eosin and Masson's trichrome. A comparative analysis was performed among 4 groups by scoring the pulmonary injury between 0 and 3 according to the infiltration of inflammatory cells into the alveolar spaces, alveolar wall thickening and architectural deformation across the entire lung section. Normality distribution were tested, then one-way ANOVA followed by post hoc Holm-Sidak testing were used.
Results: In G2 inflammatory cell infiltration, fibrosis with damage to lung structure and formation of small fibrous masses were observed. Alveolar septa was significantly thicker than G1 (p<0.05), which revealed totally normal pulmoner structure. G3 showed minimal alveolar septal thickening and infiltration of inflammatory cells into the alveolar spaces which was not significantly different than G1. Histopathological findings in G4 were similar to those in G2 and statistically different when compared with the G1 and G3(p<0.05). Conclusion: Study shows that addition of L to RT does not increase RIPF in rats.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P3-13-10.
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Affiliation(s)
- Bese N Senel
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - O Yetmen
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - E Guzel
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - C Karaca
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - I Coban
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - O Elicin
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - O Suzer
- 1I.U Cerrahpasa Medical Faculty, Istanbul, Turkey
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Elicin O, Bese NS, Yetmen O, Guzel E, Eser M, Karaca C, Coban I, Suzer O. Does lapatinib increase pulmonary toxicity when concurrently used with radiation therapy? An experimental study with Wistar albino rats. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Firat Ö, Çalişkan C, Karaca C, Sezak M, Özütemız Ö, Ersın S, Güler A. Coexistence of gastric cancer and gastrointestinal stromal tumor: report of two cases. Turk J Gastroenterol 2011; 21:302-4. [PMID: 20931437 DOI: 10.4318/tjg.2010.0105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Gastrointestinal stromal tumors and adenocancers are distinct neoplasms originating from different cell layers. Though adenocancers constitute the most common type of gastric tumors, synchronous development of a gastrointestinal stromal tumor is extremely rare. Case 1: A 63-year-old male patient underwent a radical total gastrectomy with D2 lymphadenectomy and Rouxen-Y reconstruction. Histopathologic and immunohistochemical examination of the specimen disclosed an advanced stage, intestinal type adenocancer intermixing with a distinct lesion of gastrointestinal stromal tumor. The early postoperative course was uneventful; however, recurrence was seen and he survived only 13 months. Case 2: A 60-year-old male patient underwent a distal subtotal gastrectomy with D2 lymphadenectomy, and reconstruction was provided with Billroth 2 procedure. Intraoperatively, a 0.5 cm vegetating lesion was detected on the gastric body and resected. Histopathologic and immunohistochemical examination disclosed an intestinal type adenocancer, and the incidental lesion was reported as gastrointestinal stromal tumor. His postoperative course was uneventful, and the patient is free of disease after one year. The conditions under which the synchronous tumors develop away from each other or collide are vague. Currently, the stage of the adenocancer and the size and mitotic manner of the gastrointestinal stromal tumors are the leading prognostic factors.
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Affiliation(s)
- Özgür Firat
- Department of General Surgery, Ege University School of Medicine, İzmir.
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Caliskan C, Guler N, Karaca C, Makay O, Firat O, Korkut MA. Negative prognostic factors in colorectal carcinoma: An analysis of 448 patients. Indian J Surg 2010; 72:243-8. [PMID: 23133256 DOI: 10.1007/s12262-010-0052-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 02/01/2010] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND AND AIMS Colorectal carcinoma (CRC) is the most frequent malignancy of the gastrointestinal tract. Prognostic researches are carried out for choosing the optimum therapy, evaluating therapy results and comparing multicentre results for better qualification in the therapy of the disease. PATIENTS AND METHODS In this study, 448 patients, whose surgery and follow-up was performed by the same correspondent surgeon between the years 1995 and 2003, were retrospectively analyzed. RESULTS Age, presence of comorbidity, weight loss, emergency admission, high serum CEA and CA 19-9 levels, neighboring organ invasion, operation type, major morbidity, tumor size and type, lymph node metastases, venous and perineural invasion, Dukes' classification and local recurrence and distant metastasis during follow-up are found to be significant negative factors affecting prognosis of the CRC patient. CONCLUSION Therapy results of the CRC are evaluated by survival times regardless of the therapy method selected for each individual. In our study we tried to find out negative prognostic factors by researching possible factors affecting disease free survival time for CRC. Since our understanding of factors that have an impact on prognosis increases, we are hoping to improve survival.
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Affiliation(s)
- Cemil Caliskan
- Department of General Surgery/Division of Proctology, School of Medicine, Ege University, Turkey Izmir
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Calişkan C, Karaca C, Akgün E, Korkut MA. A new extraction technique for rectal foreign bodies with a rubber band ligation device. Surg Today 2010; 40:583-5. [PMID: 20496144 DOI: 10.1007/s00595-009-4095-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Accepted: 07/16/2009] [Indexed: 11/25/2022]
Abstract
Foreign bodies in the rectum are a rare clinical condition that should be noted. The most frequently encountered cause is erotic activity. The first goal of the therapy is extraction of the foreign body using the simplest method possible while protecting the integrity of the intestine. Many instruments and methods have been suggested for this purpose. This report discusses a new management strategy for these patients along with a review of the literature.
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Affiliation(s)
- Cemil Calişkan
- Division of Proctology, Department of General Surgery, Ege University School of Medicine, 35100, Bornova, Izmir, Turkey
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Kaçar S, Varilsüha C, Gürkan A, Karaca C. Pre-operative radiochemotherapy for rectal cancer. A prospective randomized trial comparing pre-operative vs. postoperative radiochemotherapy in rectal cancer patients. Acta Chir Belg 2009; 109:701-7. [PMID: 20184052 DOI: 10.1080/00015458.2009.11680520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE The aim of the study was to find out whether pre-operative radiochemotherapy had any survival advantage over postoperative radiochemotherapy for rectal carcinoma patients without distant metastasis or peritoneal carcinomatosis. MATERIAL AND METHODS Between January 1998 and December 2003, 51 rectal carcinoma patients without distant metastasis or peritoneal carcinomatosis were randomly divided into pre-operative (PRE) and postoperative (POST) radiochemotherapy groups. Twenty-six were assigned to the PRE group and were operated on 5 to 8 weeks after the completion of radiotherapy. The other 25 patients were operated on immediately and received radiotherapy postoperatively 2 to 4 weeks after surgery. The patients were followed up for between 4 to 51 months. RESULTS In the PRE group the rates of disease-free survival were 92%, 70%, 56% and 56% at the end of the 1t, 2d, 3"r and 4th years, respectively. In the POST group those percentages were 83%, 68%, 51% and 51% at the 1S", 2nd, 3r and 4th years, respectively (p = 0.707). One-year and 4-year overall survival rates in the PRE group were 100% and 86% respectively and 100% and 60% in the POST group (p = 0.520). CONCLUSION No statistical difference was found between the survival rates of the rectal carcinoma patients receiving radiotherapy either pre-operatively or postoperatively. However, the disease-free survival rates of the PRE group were higher than the POST group's during each year and overall survival rates were higher after the third and fourth years. We conclude that pre-operative radiotherapy is at least as effective as postoperative radiotherapy.
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Kazimi M, Karaca C, Ozsoy M, Ozdemir M, Apaydin AZ, Ulukaya S, Zeytunlu M, Kilic M. Live donor liver transplantation for Budd-Chiari syndrome: anastomosis of the right hepatic vein to the right atrium. Liver Transpl 2009; 15:1374-7. [PMID: 19790160 DOI: 10.1002/lt.21815] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mircelal Kazimi
- Department of Surgery, Ege University Hospital, Izmir, Turkey
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Dağtekin M, Karaca C, Yildiz Y. Long axis heat distribution in a tunnel-ventilated broiler house equipped with an evaporative pad cooling system. Anim Prod Sci 2009. [DOI: 10.1071/ea08077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Chicken meat and egg production in the Çukurova region of Southern Turkey shows enormous potential for growth. However, high temperatures in summer pose serious difficulties for these types of production. Evaporative pad cooling systems have been used to minimise rises in temperature and are commonly used in poultry houses in this region.
The change of air temperature from the entry point to the system through the pads, to the exit point of the broiler house was investigated in this study. Experiments were carried out in a tunnel-ventilated broiler house in the Çukurova region. The broiler house has the capacity to house 15 000 chicks with a floor area of 70 by 12 m. In this experiment, the broiler house incorporated 15-cm-thick cellulose-based pads.
Results obtained in August–September 2007 revealed a cooling efficiency of 69.35%, a 5.19°C decrease from the outside air temperature after passing through the pads, and a 1.52°C increase in air temperature at the exit point, which was located at the end of the broiler house.
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Öztürk K, Ozyurt H, Somay A, Karaca C. The Effects of Nitric Oxide Donor Molsidomine on Skeletal Muscle Damage in a Rat Hind Limb Model of Ischemia-Reperfusion. Eur Surg Res 2008; 42:71-7. [DOI: 10.1159/000171070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Accepted: 07/11/2008] [Indexed: 11/19/2022]
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Kaçar S, Varilsüha C, Gürkan A, Karaca C. Pre-operative radiochemotherapy for rectal cancer. A prospective randomized trial comparing pre-operative vs. postoperative radiochemotherapy in rectal cancer patients. Acta Chir Belg 2008; 108:518-23. [PMID: 19051459 DOI: 10.1080/00015458.2008.11680278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE The aim of the study was to find out whether pre-operative radiochemotherapy had any survival advantage over postoperative radiochemotherapy for rectal carcinoma patients without distant metastasis or peritoneal carcinomatosis. MATERIAL AND METHODS Between January 1998 and December 2003, 51 rectal carcinoma patients without distant metastasis or peritoneal carcinomatosis were randomly divided into pre-operative (PRE) and postoperative (POST) radiochemotherapy groups. Twenty-six were assigned to the PRE group and were operated on 5 to 8 weeks after the completion of radiotherapy. The other 25 patients were operated on immediately and received radiotherapy postoperatively 2 to 4 weeks after surgery. The patients were followed up for between 4 to 51 months. RESULTS In the PRE group the rates of disease-free survival were 92%, 70%, 56% and 56% at the end of the 1st, 2nd, 3rd and 4th years, respectively. In the POST group those percentages were 83%, 68%, 51% and 51% at the 1st, 2nd, 3rd and 4th years, respectively (p = 0.707). One-year and 4-year overall survival rates in the PRE group were 100% and 86% respectively and 100% and 60% in the POST group (p = 0.520). CONCLUSION No statistical difference was found between the survival rates of the rectal carcinoma patients receiving radiotherapy either pre-operatively or postoperatively. However, the disease-free survival rates of the PRE group were higher than the POST group's during each year and overall survival rates were higher after the third and fourth years. We conclude that pre-operative radiotherapy is at least as effective as postoperative radiotherapy.
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Affiliation(s)
- S. Kaçar
- From the 3rd Clinic of General Surgery, SB Tepecik Hospital, Izmir, Turkey
| | - C. Varilsüha
- From the 3rd Clinic of General Surgery, SB Tepecik Hospital, Izmir, Turkey
| | - A. Gürkan
- From the 3rd Clinic of General Surgery, SB Tepecik Hospital, Izmir, Turkey
| | - C. Karaca
- From the 3rd Clinic of General Surgery, SB Tepecik Hospital, Izmir, Turkey
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Umay C, Bese NS, Serdengecti S, Kepil N, Karaca C, Sut N, Altug T, Ober A. The effects of concurrent or sequential administration of trastuzumab on radiation-induced pulmonary fibrosis in rats. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.11554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Umav C, Bese N, Serdengecti S, Kepil N, Karaca C, Sut N, Altug T, Ober A. The effects of concurrent or sequential administration of trastuzumab on radiation-induced pulmonary fibrosis in rats. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)70531-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Gürkan A, Kaçar S, Erdoğdu U, Varılsüha C, Kandemir G, Karaca C, Akman F. The Effect of Sirolimus in the Development of Chronic Allograft Nephropathy. Transplant Proc 2008; 40:114-6. [DOI: 10.1016/j.transproceed.2007.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Karaca C, Menderes A, Baytekin C, Ozer E, Vayvada H. INTERESTING CASE: Endosteal formation of new bone around a Kirschner wire in long term follow up of a patient with mandibular Ewing sarcoma. Br J Oral Maxillofac Surg 2006; 44:216. [PMID: 16677918 DOI: 10.1016/j.bjoms.2005.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2004] [Accepted: 03/31/2005] [Indexed: 11/17/2022]
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Vayvada H, Karaca C, Menderes A, Yilmaz M. Question mark ear deformity and a modified surgical correction method: a case report. Aesthetic Plast Surg 2005; 29:251-4; discussion 255. [PMID: 16044239 DOI: 10.1007/s00266-004-0136-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Question mark ear (Cosman ear) deformity, a rare congenital malformation, is characterized by a cleft between the helix and the ear lobe and marked prominence of the auricles. Although the features of question mark ear deformity are well described in the literature, there is no definitive surgical technique for repair of this deformity, Several surgical methods have been introduced for the correction of the deformity. These techniques mainly provide for repair of the cleft between the helix and ear lobe. However, marked prominence of the upper auricle usually is also present with the cleft. We modified the surgical technique to correct the cleft and the upper prominence at the same time. With this procedure, the cleft is exposed by raising a vertical cutaneous flap based on the cleft on the posterior side of the ear, After anterior scoring to form the antihelix and cleft repair using an ipsilateral conchal cartilage graft, the cutaneous flap is used to cover the cartilage graft and the flap donor site is closed primarily to facilitate restoration of the antihelix. The authors report on a patient with Cosman ear and introduce their modified technique that can be used for repair of the cleft between the helix and ear lobe and the prominence of the upper helix in the same procedure.
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Affiliation(s)
- Haluk Vayvada
- Dokuz Eylul Universities Tip Fakultesi, Plastic ve Rekonstruktif Cerrahi Anabilim Dali, Inciralti Izmir 35340, Turkey.
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Abstract
Alternative sources for repair of cartilage defects are limited and donor sites are associated with morbidity. It is known that cartilage development from periosteal grafts is possible. Various factors have been found positively to affect this process in experimental settings. However, all of these studies were limited to joint cartilage. We conducted an experimental study in rabbits for the investigation of the elastic cartilage regeneration from perichondrial and periosteal grafts together with the effects of hyaluronan on this process. 1 x 1 cm(2) cartilage defects were created on the elastic ear cartilage of rabbits. Four experimental groups with 18 ears in each group were created: Group 1 (repair with perichondrium graft), group 2 (repair with periosteum graft), group 3 (repair with periosteum graft+hyaluronan), group 4 (defect-only control group). Macroscopic and microscopic evaluations were done on the 4th, 8th and 12th weeks. Cellular morphology of the regenerated cartilage and its integration and similarity with adjacent cartilage were evaluated. Cartilage regeneration groups 1, 2 and 3 were found to be statistically different from the control group. There was not a significant difference between groups 1 and 2 or 2 and 3. There is no significant difference between perichondrial and periosteal grafts in cartilage regeneration, and hyaluronan has no beneficial effect on this process.
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Affiliation(s)
- Kutay Ulutaş
- Department of Plastic and Reconstructive Surgery, Medical Faculty, Dokuz Eylül University, 35340 Inciralti, Izmir, Turkey.
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Uslu A, Cayci M, Nart A, Karaca C, Zalluhoglu N, Gürkan A, Varilsuha C, Adagülü H. Renal failure in obstructive jaundice. Hepatogastroenterology 2005; 52:52-4. [PMID: 15782993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
BACKGROUND/AIMS The optimal preoperative management of patients with acute obstructive jaundice is still a matter of debate. Reduction in effective plasma volume and systemic endotoxemia are major consequences both in experimental acute bile duct ligation and in patients with acute obstructive jaundice (AOJ). The objective of this study is to show the necessity for adequate preoperative hydration and lactulose administration for the prevention of postoperative renal dysfunction in patients with AOJ. METHODOLOGY Fifty-five patients (35 male, 20 female) with a mean age of 62 years were entered into the study. There were 23 benign and 32 malignant strictures in this group. All patients received oral lactulose (30-45mL per day) and IV cefazoline (3-4g/day) before surgery. Fluid and electrolyte balance was precisely maintained throughout the hospitalization via daily body weight calculations. High-risk elderly patients with left ventricular systolic dysfunction were assessed by echocardiography and therapeutic measures were undertaken. Renal function was assessed by creatinine clearance (ClCr) measurements and impairment of renal function was defined as a >20% fall in ClCr value post-surgery. RESULTS Mean preoperative bilirubin level was 11.05mg/dL (range: 3.45-27.0mg/dL). None of the patients developed postoperative renal failure. The difference between pre- and postoperative ClCr value (104.02mL/min vs. 101.0mL/min respectively) was not significant (t=0.698, P=0.489). One patient with mild renal function impairment before surgery (ClCr=45.4mL/min) successfully recovered with 60% rise in creatinine clearance (ClCr=78.1mL/min) after the operation. Three patients with normal functioning kidneys died within 30 days of operation. The principle cause of death was carcinomatosis and pulmonary embolus in two and intraoperative hemorrhagic shock in one patient. CONCLUSIONS These results further substantiated the importance of adequate preoperative hydration and endotoxin inactivation in terms of acute renal failure prophylaxis in patients with AOJ. This regimen obviates the afferent events in obstructive jaundice and provides prevention of acute renal failure even in high-risk elderly patients.
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Affiliation(s)
- A Uslu
- First Department of General Surgery and Organ Transplantation Center, SSK Tepecik Teaching Hospital, Izmir, Turkey
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