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Walach M, Schiefelbein F, Schneller A, Schoen G, Von Klot C, Mühlbauer J, Nuhn P, Kriegmair M, Harke N. Perinephric toxic fat: Impact on surgical complexity, perioperative outcome and surgical approach in partial nephrectomy. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00297-4] [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: 11/04/2022]
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Harke N, Schiefelbein F, Schneller A, Schoen G, Wiesinger C, Pfuner J, Falkensammer E, Gilbert N, Eraky A, Zimmermanns V, Paramythelli I, Hadaschik B, Radtke J, Darr C, Kriegmair M, Flintrop M, Wolters M, Faraj Tabrizi P, Kuczyk M, Osmonov D. Robot-assisted partial nephrectomy for multiple renal tumors – a multicenter analysis. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00437-7] [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: 11/04/2022]
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Maas KJ, Warncke M, Behzadi C, Welsch GH, Schoen G, Kaul MG, Adam G, Bannas P, Henes FO. Correlation of T2* relaxation times of the retropatellar cartilage with tibial tuberosity-trochlea groove distance in professional soccer players. Sci Rep 2020; 10:15355. [PMID: 32948810 PMCID: PMC7501245 DOI: 10.1038/s41598-020-72299-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 02/26/2020] [Accepted: 08/26/2020] [Indexed: 12/14/2022] Open
Abstract
The tibial tuberosity–trochlear groove (TT–TG) distance is a radiographic measurement that is used to quantify malalignment of the patellofemoral joint (PFJ) in cross-sectional imaging. There is an ongoing debate about the impact of the TT–TG-distance on lateral patellar instability and the initiating of cartilage degeneration. In this prospective study, the association of T2* relaxation times and TT–TG distances in professional soccer players was analyzed. 36 knees of 18 professional soccer players (age: 21 ± 2.8 years) were evaluated. Participants underwent knee MRI at 3 T. For qualitative image analysis, fat-saturated 2D PD-weighted Fast Spin Echo (FSE) and T1-weighted FSE sequences were used. For quantitative analysis, T2* measurements in 3D data acquisitions were performed. In a qualitative analysis there was no structural cartilage damage and no abnormalities of the patellar and trochlea shape. The highest T2* values (26.7 ± 5.9 ms) were observed in the central compartment of the patella. The mean TT–TG distance was 10 ± 4 mm (range 3–20 mm). There was no significant correlation between TT–TG distance and T2* relaxation times in all three compartments of the retropatellar cartilage. Our study shows that so long as patellar and trochlear morphology is normal, TT–TG distance alone does not affect the tissue structure of the retropatellar cartilage in professional soccer players.
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Affiliation(s)
- Kai-Jonathan Maas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
| | - M Warncke
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - C Behzadi
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - G H Welsch
- UKE Athleticum-Center for Athletic Medicine, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - G Schoen
- Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - M G Kaul
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - G Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - P Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
| | - F O Henes
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, Center for Radiology and Endoscopy, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
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Schaefer A, Sarwari H, Deuschl F, Schirmer J, Schofer N, Schneeberger Y, Schoen G, Blankenberg S, Reichenspurner H, Schäfer U, Conradi L. Transcatheter Aortic Valve Implantation in Patients with Mitral Annular Calcification or Mitral Stenosis: Analysis of Acute Hemodynamic Changes and Acute and Long-Term Outcomes. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678872] [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: 10/27/2022]
Affiliation(s)
- A. Schaefer
- University Heart Center Hamburg, Hamburg, Germany
| | - H. Sarwari
- University Heart Center Hamburg, Hamburg, Germany
| | - F. Deuschl
- University Heart Center Hamburg, Hamburg, Germany
| | - J. Schirmer
- University Heart Center Hamburg, Hamburg, Germany
| | - N. Schofer
- University Heart Center Hamburg, Hamburg, Germany
| | | | - G. Schoen
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | | | - U. Schäfer
- University Heart Center Hamburg, Hamburg, Germany
| | - L. Conradi
- University Heart Center Hamburg, Hamburg, Germany
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Schneeberger Y, Schäfer A, Gulbins H, Reiter B, Sill B, Schoen G, Geronne P, Bernhard M, Reichenspurner H. Surgeons' Experience in Off-Pump Coronary Artery Bypass Grafting: Is There a Difference in the Acute 30-Day Outcome. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628019] [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: 10/28/2022]
Affiliation(s)
- Y. Schneeberger
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - A. Schäfer
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - H. Gulbins
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - B. Reiter
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - B. Sill
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - G. Schoen
- Department of Medical Biometry and Epidemiology, University Hospital Hamburg Eppendorf, Hamburg, Germany
| | - P. Geronne
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - M. Bernhard
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - H. Reichenspurner
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
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Spink C, Avanesov M, Schmidt T, Grass M, Schoen G, Adam G, Koops A, Ittrich H, Bannas P. Noise reduction angiographic imaging technology reduces radiation dose during bronchial artery embolization. Eur J Radiol 2017; 97:115-118. [PMID: 29153361 DOI: 10.1016/j.ejrad.2017.10.029] [Citation(s) in RCA: 3] [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: 06/23/2017] [Revised: 10/25/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE Comparison of radiation doses in patients undergoing angiographic bronchial artery embolization (BAE) before and after a noise reduction imaging technology upgrade. METHODS We performed a retrospective study of 70 patients undergoing BAE. Procedures were performed before (n=32) and after (n=38) the technology upgrade containing additional filters and improved image-processing. Cumulative air kerma (AK), cumulative dose area product (DAP), number of exposure frames, total fluoroscopy time and amount of contrast agent were recorded. Mean values were calculated and compared using two-tailed t-tests. DSA image quality was assessed independently by two blinded readers and compared using the Wilcoxon signed-rank test. RESULTS Using the new technology resulted in a significant reduction of 59% in DAP (149.2 (103.1-279.1) vs. 54.8 (38.2-100.7) Gy*cm2, p<0.001) and a significant reduction of 60% for AK (1.3 (0.6-1.9) vs. 0.5 (0.3-0.9) Gy, p<0.001) in comparison to procedures before the upgrade. There was no significant difference between the number of exposure frames in both groups (251±181 vs. 254±133 frames, p=0.07), time of fluoroscopy (28.8 (18.5-50.4) vs. 28.1 (23.3-38.7) min, p=0.73), or the amount of contrast agent used (139.5±70.8 vs. 163.1±63.1ml, p=0.11). No significant difference regarding image quality could be detected (3 (2,3) vs. 3 (2-4), p=0.64). CONCLUSIONS The new angiographic noise reduction technology significantly decreases the radiation dose during bronchial artery embolization without compromising image quality or increasing time of fluoroscopy or contrast volume.
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Affiliation(s)
- C Spink
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - M Avanesov
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - T Schmidt
- Philips Healthcare, Hamburg, Germany
| | - M Grass
- Philips Healthcare, Hamburg, Germany
| | - G Schoen
- Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - G Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Koops
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - H Ittrich
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - P Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Schaefer A, Dickow J, Schoen G, Westhofen S, Al-Saydali T, Kloss L, Reichenspurner H, Detter C. Aortic Valve Replacement for Infective Endocarditis: Case Matched Comparison of a Stentless Bovine Pericardial Aortic Valve vs. A Stented Bovine Pericardial Valve. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598773] [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: 10/20/2022]
Affiliation(s)
- A. Schaefer
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - J. Dickow
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - G. Schoen
- Department of Medical Biometry and Epidemiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - S. Westhofen
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - T. Al-Saydali
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - L. Kloss
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - H. Reichenspurner
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
| | - C. Detter
- Department of Cardiovascular Surgery, University Heart Center Hamburg, Hamburg, Germany
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Spink C, Avanesov M, Schmidt T, Grass M, Schoen G, Adam G, Bannas P, Koops A. Radiation dose reduction during transjugular intrahepatic portosystemic shunt implantation using a new imaging technology. Eur J Radiol 2016; 86:284-288. [PMID: 28027761 DOI: 10.1016/j.ejrad.2016.11.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 08/17/2016] [Revised: 11/15/2016] [Accepted: 11/23/2016] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To compare patient radiation dose in patients undergoing transjugular intrahepatic portosystemic shunt (TIPS) implantation before and after an imaging-processing technology upgrade. METHODS In our retrospective single-center-study, cumulative air kerma (AK), cumulative dose area product (DAP), total fluoroscopy time and contrast agent were collected from an age- and BMI-matched collective of 108 patients undergoing TIPS implantation. 54 procedures were performed before and 54 after the technology upgrade. Mean values were calculated and compared using two-tailed t-tests. Two blinded, independent readers assessed DSA image quality using a four-rank likert scale and the Wilcoxcon test. RESULTS The new technology demonstrated a significant reduction of 57% of mean DAP (402.8 vs. 173.3Gycm2, p<0.001) and a significant reduction of 58% of mean AK (1.7 vs. 0.7Gy, p<0.001) compared to the precursor technology. Time of fluoroscopy (26.4 vs. 27.8min, p=0.45) and amount of contrast agent (109.4 vs. 114.9ml, p=0.62) did not differ significantly between the two groups. The DSA image quality of the new technology was not inferior (2.66 vs. 2.77, p=0.56). CONCLUSIONS In our study the new imaging technology halved radiation dose in patients undergoing TIPS maintaining sufficient image quality without a significant increase in radiation time or contrast consumption.
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Affiliation(s)
- C Spink
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - M Avanesov
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - T Schmidt
- Philips Healthcare, Hamburg, Germany
| | - M Grass
- Philips Research, Hamburg, Germany
| | - G Schoen
- Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - G Adam
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - P Bannas
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A Koops
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Behzadi C, Welsch GH, Laqmani A, Henes FO, Kaul MG, Schoen G, Adam G, Regier M. Comparison of T2* relaxation times of articular cartilage of the knee in elite professional football players and age-and BMI-matched amateur athletes. Eur J Radiol 2016; 86:105-111. [PMID: 28027735 DOI: 10.1016/j.ejrad.2016.10.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 06/23/2016] [Revised: 09/26/2016] [Accepted: 10/26/2016] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Recent investigation has underlined the potential of quantitative MR imaging to be used as a complementary tool for the diagnosis of cartilage degeneration at an early state. The presented study analyses T2* relaxation times of articular cartilage of the knee in professional athletes and compares the results to age- and BMI (Body Mass Index)-matched healthy amateur athletes. MATERIALS AND METHODS 22 professional football players and 22 age- and BMI-matched individuals were underwent knee Magnetic Resonance Imaging (MRI) at 3T including qualitative and quantitative analysis. Qualitative analysis included e.g. meniscal tears, joint effusion and bone edema. For quantitative analysis T2* (22 ET: 4.6-53.6ms) measurements in 3D data acquisition were performed. Deep and superficial layers of 22 predefined cartilage segments were analysed. All data sets were postprocessed using a dedicated software tool. Statistical analysis included Student t-test, confidence intervals and a random effects model. RESULTS In both groups, T2* relaxation times were significantly higher in the superficial compared to the deep layers (p<0.001). Professional athletes had significantly higher relaxation times in eight superficial and three deep cartilage layers in the predefined cartilage segments (p<0.05). Highly significant differences were found in the weight-bearing segments of the lateral superficial femoral condyle (p<0.001). CONCLUSION Elevated T2* values in cartilage layers of professional football players compared to amateur athletes were noted. The effects seem to predominate in superficial cartilage layers.
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Affiliation(s)
- C Behzadi
- Department of Diagnostic and Interventional Radiology and Nuclearmedicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany.
| | - G H Welsch
- Department of Sports Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany
| | - A Laqmani
- Department of Diagnostic and Interventional Radiology and Nuclearmedicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany
| | - F O Henes
- Department of Diagnostic and Interventional Radiology and Nuclearmedicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany
| | - M G Kaul
- Department of Diagnostic and Interventional Radiology and Nuclearmedicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany
| | - G Schoen
- Department of Medical Biometry and Epidemiology, University Medical Center, Hamburg-Eppendorf, Hamburg, 20246, Germany
| | - G Adam
- Department of Diagnostic and Interventional Radiology and Nuclearmedicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany
| | - M Regier
- Department of Diagnostic and Interventional Radiology and Nuclearmedicine, University Medical Center Hamburg-Eppendorf, Hamburg, 20246, Germany
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Linder M, Seiffert M, Schofer N, Deuschl F, Schoen G, Schirmer J, Treede H, Blankenberg S, Reichenspurner H, Schaefer U, Conradi L. Device Landing Zone Calcification and Its Impact on Post Procedural Paravalvular Leakage after Transcatheter Aortic Valve Implantation with Two Generations of Balloon-expandable Transcatheter Heart Valves. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571488] [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]
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Heinrich E, Ferber A, Schoen G, Schiefelbein F, Trojan L, Egner T. MP-13.05 Five Years' Experience with High-Intensity Focused Ultrasonography for Prostate Cancer Treatment: A Mid-Term Follow Up. Urology 2011. [DOI: 10.1016/j.urology.2011.07.304] [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: 10/16/2022]
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Schnell R, Katouzi AA, Linnartz C, Schoen G, Drillich S, Hansmann ML, Schiefer D, Barth S, Zangemeister-Wittke U, Stahel RA, Diehl V, Engert A. Potent anti-tumor effects of an anti-CD24 ricin A-chain immunotoxin in vitro and in a disseminated human Burkitt's lymphoma model in SCID mice. Int J Cancer 1996; 66:526-31. [PMID: 8635869 DOI: 10.1002/(sici)1097-0215(19960516)66:4<526::aid-ijc17>3.0.co;2-5] [Citation(s) in RCA: 11] [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] [Indexed: 02/01/2023]
Abstract
A new anti-CD24 immunotoxin (IT), SWA11.dgA, was constructed by coupling the MAb SWA11 via the bivalent linker SMPT to deglycosylated ricin A-chain (dgA). The effects of SWA11.dgA were evaluated in vitro against the B-precursor leukemia cell line REH, the non-B-non-T acute lymphoblastic leukemia cell line NALM-6 and the Burkitt's lymphoma cell lines BL-2 and BL-38. Binding of SWA11 to the CD24 antigen was assessed by flow cytometry demonstrating high affinity of the MAb for all cell lines tested. SWA11.dgA inhibited the protein synthesis of BL-38, NALM-6, REH and BL-2 cells by 50% at concentrations (IC50) of 4.0 x 10(-11) M, 6.0 x 10(-11) M, 8.0 x 10(-11) M and 3.0 x 10(-9) M, respectively. SWA11.dgA was subsequently used for the treatment of disseminated human BL-38 Burkitt's lymphoma in a newly developed SCID mouse model. The mean survival time (MST) of BL-38-bearing SCID mice was extended from 23 days in untreated controls to more than 230 days when 6 microg SWA11.dgA was applied intraperitoneally one day after tumor challenge. All of the animals achieved continuous complete remissions. SCID mice treated with SWA11.dgA 4 days after tumor cell challenge or a reduced dose of SWA11.dgA (67%) also had a significantly extended MST (45.0 and 51.4 days, respectively, as compared to 22.7 and 23.1 days in the controls). We conclude that SWA11.dgA might be of potential use for the treatment of lymphoma in man.
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Affiliation(s)
- R Schnell
- Department of Medicine I, University of Cologne, Germany
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Schoen G. Health screening at a regional dental meeting. N Y State Dent J 1969; 35:408-10. [PMID: 5256975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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