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Kiran RP, Kochhar GS, Kariv R, Rex DK, Sugita A, Rubin DT, Navaneethan U, Hull TL, Ko HM, Liu X, Kachnic LA, Strong S, Iacucci M, Bemelman W, Fleshner P, Safyan RA, Kotze PG, D'Hoore A, Faiz O, Lo S, Ashburn JH, Spinelli A, Bernstein CN, Kane SV, Cross RK, Schairer J, McCormick JT, Farraye FA, Chang S, Scherl EJ, Schwartz DA, Bruining DH, Philpott J, Bentley-Hibbert S, Tarabar D, El-Hachem S, Sandborn WJ, Silverberg MS, Pardi DS, Church JM, Shen B. Management of pouch neoplasia: consensus guidelines from the International Ileal Pouch Consortium. Lancet Gastroenterol Hepatol 2022; 7:871-893. [PMID: 35798022 DOI: 10.1016/s2468-1253(22)00039-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/18/2022] [Accepted: 01/27/2022] [Indexed: 02/07/2023]
Abstract
Surveillance pouchoscopy is recommended for patients with restorative proctocolectomy with ileal pouch-anal anastomosis in ulcerative colitis or familial adenomatous polyposis, with the surveillance interval depending on the risk of neoplasia. Neoplasia in patients with ileal pouches mainly have a glandular source and less often are of squamous cell origin. Various grades of neoplasia can occur in the prepouch ileum, pouch body, rectal cuff, anal transition zone, anus, or perianal skin. The main treatment modalities are endoscopic polypectomy, endoscopic ablation, endoscopic mucosal resection, endoscopic submucosal dissection, surgical local excision, surgical circumferential resection and re-anastomosis, and pouch excision. The choice of the treatment modality is determined by the grade, location, size, and features of neoplastic lesions, along with patients' risk of neoplasia and comorbidities, and local endoscopic and surgical expertise.
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Affiliation(s)
- Ravi P Kiran
- Division of Colorectal Surgery, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
| | - Gursimran S Kochhar
- Division of Gastroenterology, Hepatology, and Nutrition, Allegheny Health Network, Pittsburgh, PA, USA
| | - Revital Kariv
- Department of Gastroenterology, Tel Aviv Sourasky Medical Center and Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Douglas K Rex
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Akira Sugita
- Department of Clinical Research and Department of inflammatory Bowel Disease, Yokohama Municipal Citizens Hospital Yokohama, Japan
| | - David T Rubin
- University of Chicago Medicine Inflammatory Bowel Disease Center, Chicago, IL, USA
| | - Udayakumar Navaneethan
- IBD Center and IBD Interventional Unit, Center for Interventional Endoscopy, Orlando Health, Orlando, FL, USA
| | - Tracy L Hull
- Department of Colorectal Surgery, Cleveland Clinic, Cleveland, OH, USA
| | - Huaibin Mabel Ko
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
| | - Xiuli Liu
- Department of Pathology and Immunology, Washington University, St Louis, MO, USA
| | - Lisa A Kachnic
- Department of Radiation Oncology, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
| | - Scott Strong
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Marietta Iacucci
- Institute of Immunology and Immunotherapy, NIHR Birmingham Biomedical Research Centre, University Hospitals NHS Foundation Trust, University of Birmingham, UK
| | - Willem Bemelman
- Department of Surgery, Academic Medical Center, Amsterdam, Netherlands
| | - Philip Fleshner
- Division of Colorectal Surgery, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Rachael A Safyan
- Division of Hematology and Oncology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Paulo G Kotze
- IBD Outpatients Clinic, Catholic University of Paraná, Curitiba, Brazil
| | - André D'Hoore
- Department of Abdominal Surgery, University Hospital Leuven, Belgium
| | - Omar Faiz
- Department of Surgery, St Mark's Hospital and Academic Institute, Harrow and Department of Surgery and Cancer, Imperial College London, London, UK
| | - Simon Lo
- Pancreatic and Biliary Disease Program, Digestive Diseases, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Jean H Ashburn
- Department of Surgery, Wake Forest University Baptist Medical Center, Winston-Salem, NC, USA
| | - Antonino Spinelli
- Department of Biomedical Sciences, Humanitas University and IRCCS Humanitas Research Hospital, Division Colon and Rectal Surgery, Rozzano, Milan, Italy
| | - Charles N Bernstein
- University of Manitoba Inflammatory Bowel Disease Clinical and Research Centre, Winnipeg, MB, Canada
| | - Sunanda V Kane
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Raymond K Cross
- Inflammatory Bowel Disease Program, University of Maryland School of Medicine, MD, USA
| | - Jason Schairer
- Department of Gastroenterology, Henry Ford Health System, Detroit, MI, USA
| | - James T McCormick
- Division of Colon and Rectal Surgery, Allegheny Health Network, Pittsburgh, PA, USA
| | - Francis A Farraye
- Division of Gastroenterology and Hepatology, Mayo Clinic Florida, Jacksonville, FL, USA
| | - Shannon Chang
- Inflammatory Bowel Disease Center, NYU Langone Health, NYU Grossman School of Medicine, New York, NY, USA
| | - Ellen J Scherl
- Jill Roberts Center for IBD, Gastroenterology and Hepatology, Weill Cornell Medicine and NewYork Presbyterian Hospital, New York, NY, USA
| | - David A Schwartz
- Department of Gastroenterology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - David H Bruining
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Jessica Philpott
- Department of Gastroenterology, Hepatology, and Nutrition, Cleveland Clinic, Cleveland, OH, USA
| | - Stuart Bentley-Hibbert
- Department of Radiology, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
| | - Dino Tarabar
- IBD Clinical Center, University Hospital Center Dr Dragiša Mišović, Belgrade, Serbia
| | - Sandra El-Hachem
- Division of Gastroenterology, Hepatology, and Nutrition, Allegheny Health Network, Pittsburgh, PA, USA
| | - William J Sandborn
- Department of Medicine, University of California San Diego, San Diego, CA, USA
| | - Mark S Silverberg
- Mount Sinai Hospital Inflammatory Bowel Disease Centre, Toronto, ON, Canada
| | - Darrell S Pardi
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - James M Church
- Division of Colorectal Surgery, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA
| | - Bo Shen
- Center for Interventional Inflammatory Bowel Disease, Columbia University Irving Medical Center-New York Presbyterian Hospital, New York, NY, USA.
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2
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Jacobs JP, Goudarzi M, Lagishetty V, Li D, Mak T, Tong M, Ruegger P, Haritunians T, Landers C, Fleshner P, Vasiliauskas E, Ippoliti A, Melmed G, Shih D, Targan S, Borneman J, Fornace AJ, McGovern DPB, Braun J. Crohn's disease in endoscopic remission, obesity, and cases of high genetic risk demonstrates overlapping shifts in the colonic mucosal-luminal interface microbiome. Genome Med 2022; 14:91. [PMID: 35971134 PMCID: PMC9377146 DOI: 10.1186/s13073-022-01099-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 08/02/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Crohn's disease (CD) patients demonstrate distinct intestinal microbial compositions and metabolic characteristics compared to unaffected controls. However, the impact of inflammation and underlying genetic risk on these microbial profiles and their relationship to disease phenotype are unclear. We used lavage sampling to characterize the colonic mucosal-luminal interface (MLI) microbiome of CD patients in endoscopic remission and unaffected controls relative to obesity, disease genetics, and phenotype. METHODS Cecum and sigmoid colon were sampled from 110 non-CD controls undergoing screening colonoscopy who were stratified by body mass index and 88 CD patients in endoscopic remission (396 total samples). CD polygenic risk score (GRS) was calculated using 186 known CD variants. MLI pellets were analyzed by 16S ribosomal RNA gene sequencing, and supernatants by untargeted liquid chromatography-mass spectrometry. RESULTS CD and obesity were each associated with decreased cecal and sigmoid MLI bacterial diversity and distinct bacterial composition compared to controls, including expansion of Escherichia/Shigella. Cecal and sigmoid dysbiosis indices for CD were significantly greater in obese controls than non-overweight controls. CD, but not obesity, was characterized by altered biogeographic relationship between the sigmoid and cecum. GRS was associated with select taxonomic shifts that overlapped with changes seen in CD compared to controls including Fusobacterium enrichment. Stricturing or penetrating Crohn's disease behavior was characterized by lower MLI bacterial diversity and altered composition, including reduced Faecalibacterium, compared to uncomplicated CD. Taxonomic profiles including reduced Parasutterella were associated with clinical disease progression over a mean follow-up of 3.7 years. Random forest classifiers using MLI bacterial abundances could distinguish disease state (area under the curve (AUC) 0.93), stricturing or penetrating Crohn's disease behavior (AUC 0.82), and future clinical disease progression (AUC 0.74). CD patients showed alterations in the MLI metabolome including increased cholate:deoxycholate ratio compared to controls. CONCLUSIONS Obesity, CD in endoscopic remission, and high CD genetic risk have overlapping colonic mucosal-luminal interface (MLI) microbiome features, suggesting a shared microbiome contribution to CD and obesity which may be influenced by genetic factors. Microbial profiling during endoscopic remission predicted Crohn's disease behavior and progression, supporting that MLI sampling could offer unique insight into CD pathogenesis and provide novel prognostic biomarkers.
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Affiliation(s)
- Jonathan P Jacobs
- Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095-6949, USA.
- Division of Gastroenterology, Hepatology and Parenteral Nutrition, Veterans Administration Greater Los Angeles Healthcare System, Los Angeles, USA.
| | | | - Venu Lagishetty
- Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095-6949, USA
| | - Dalin Li
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Tytus Mak
- National Institute of Standards and Technology, Gaithersburg, USA
| | - Maomeng Tong
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, USA
| | - Paul Ruegger
- Department of Plant Pathology and Microbiology, University of California Riverside, Riverside, USA
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Carol Landers
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Philip Fleshner
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Eric Vasiliauskas
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Andrew Ippoliti
- Department of Medicine, Keck School of Medicine of USC, Los Angeles, USA
| | - Gil Melmed
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - David Shih
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Stephan Targan
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - James Borneman
- Department of Plant Pathology and Microbiology, University of California Riverside, Riverside, USA
| | - Albert J Fornace
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, USA
| | - Dermot P B McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Jonathan Braun
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, USA
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3
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Wood T, Truong A, Mujukian A, Zaghiyan K, Fleshner P. Increasing experience with the LIFT procedure in Crohn's disease patients with complex anal fistula. Tech Coloproctol 2022; 26:205-212. [PMID: 35103901 DOI: 10.1007/s10151-022-02582-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 01/21/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Surgical management of anal fistulas in Crohn's disease (CD) is associated with high failure rates, and treatment options are limited due to ongoing proctitis, multiple tracts, and concern for incontinence and non-healing wounds. The aim of this study was to investigate the healing rate of ligation of the inters-sphincteric fistula tract (LIFT) for anal fistulas in Crohn's disease and identify prognostic factors for healing. METHODS This prospective analysis compared long-term healing rates of CD patients undergoing LIFT for anal fistulas. Consecutive patients with CD who underwent LIFT procedure at our institution, in the period from March 2012 to September 2019 were included. The main outcome was anal fistula healing rate. RESULTS The study cohort of 46 patients (mean age of 34.2 ± 13.0 years, 18 (40%) males). After a mean follow-up time of 33 ± 28 months, fistula healing was seen in 30 (65%) patients. A total of 8 patients were noted to have inter-sphincteric recurrence and 8 patients had trans-sphincteric recurrence. Smoking at the time of surgery was significantly associated with LIFT failure (HR 3.18, 95% CI 1.18-8.61, p = 0.02). Other factors, such as age, sex, race, disease duration and location, type of fistula history of proctitis, preoperatively use of biologics or a seton, and previous repair attempts, did not appear to influence LIFT healing. Although not statistically significant, there was a trend toward increase in failure among patients with active proctitis at the time of surgery (HR 1.97, 95% CI 0.71-5.42, p = 0.19). CONCLUSION Our increasing experience with LIFT for anal fistula in CD demonstrates a higher rate of healing (65%) than previously reported (48%). Smoking appears to negatively influence healing of LIFT in CD.
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Affiliation(s)
- T Wood
- Department of Surgery, Cedars-Sinai Medical Center, 8737 Beverly Blvd, Suite 101, Los Angeles, CA, 90048, USA
| | - A Truong
- Department of Surgery, Cedars-Sinai Medical Center, 8737 Beverly Blvd, Suite 101, Los Angeles, CA, 90048, USA
| | - A Mujukian
- Department of Surgery, Cedars-Sinai Medical Center, 8737 Beverly Blvd, Suite 101, Los Angeles, CA, 90048, USA
| | - K Zaghiyan
- Department of Surgery, Cedars-Sinai Medical Center, 8737 Beverly Blvd, Suite 101, Los Angeles, CA, 90048, USA
| | - P Fleshner
- Department of Surgery, Cedars-Sinai Medical Center, 8737 Beverly Blvd, Suite 101, Los Angeles, CA, 90048, USA.
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4
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Shen B, Kochhar GS, Rubin DT, Kane SV, Navaneethan U, Bernstein CN, Cross RK, Sugita A, Schairer J, Kiran RP, Fleshner P, McCormick JT, D'Hoore A, Shah SA, Farraye FA, Kariv R, Liu X, Rosh J, Chang S, Scherl E, Schwartz DA, Kotze PG, Bruining DH, Philpott J, Abraham B, Segal J, Sedano R, Kayal M, Bentley-Hibbert S, Tarabar D, El-Hachem S, Sehgal P, Picoraro JA, Vermeire S, Sandborn WJ, Silverberg MS, Pardi DS. Treatment of pouchitis, Crohn's disease, cuffitis, and other inflammatory disorders of the pouch: consensus guidelines from the International Ileal Pouch Consortium. Lancet Gastroenterol Hepatol 2022; 7:69-95. [PMID: 34774224 DOI: 10.1016/s2468-1253(21)00214-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/29/2021] [Accepted: 06/01/2021] [Indexed: 02/06/2023]
Abstract
Pouchitis, Crohn's disease of the pouch, cuffitis, polyps, and extraintestinal manifestations of inflammatory bowel disease are common inflammatory disorders of the ileal pouch. Acute pouchitis is treated with oral antibiotics and chronic pouchitis often requires anti-inflammatory therapy, including the use of biologics. Aetiological factors for secondary pouchitis should be evaluated and managed accordingly. Crohn's disease of the pouch is usually treated with biologics and its stricturing and fistulising complications can be treated with endoscopy or surgery. The underlying cause of cuffitis determines treatment strategies. Endoscopic polypectomy is recommended for large, symptomatic inflammatory polyps and polyps in the cuff. The management principles of extraintestinal manifestations of inflammatory bowel disease in patients with pouches are similar to those in patients without pouches.
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Affiliation(s)
- Bo Shen
- Center for Interventional Inflammatory Bowel Disease, Columbia University Irving Medical Center, NewYork Presbyterian Hospital, New York, NY, USA.
| | - Gursimran S Kochhar
- Division of Gastroenterology, Hepatology, and Nutrition, Allegheny Health Network, Pittsburgh, PA, USA
| | - David T Rubin
- University of Chicago Medicine Inflammatory Bowel Disease Center, Chicago, IL, USA
| | - Sunanda V Kane
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Udayakumar Navaneethan
- Center for IBD and Interventional IBD Unit, Digestive Health Institute, Orlando Health, Orlando, FL, USA
| | - Charles N Bernstein
- Inflammatory Bowel Disease Clinical and Research Centre, University of Manitoba, Winnipeg, MB, Canada
| | - Raymond K Cross
- Inflammatory Bowel Disease Program, University of Maryland School of Medicine, Maryland, MD, USA
| | - Akira Sugita
- Department of Clinical Research and Department of inflammatory Bowel Disease, Yokohama Municipal Citizens Hospital, Yokohama, Japan
| | - Jason Schairer
- Department of Gastroenterology, Henry Ford Health System, Detroit, MI, USA
| | - Ravi P Kiran
- Division of Colorectal Surgery, Columbia University Irving Medical Center, NewYork Presbyterian Hospital, New York, NY, USA
| | - Philip Fleshner
- Division of Colorectal Surgery, University of California-Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - James T McCormick
- Division of Colon and Rectal Surgery, Allegheny Health Network, Pittsburgh, PA, USA
| | - André D'Hoore
- Department of Abdominal Surgery, University Hospital Leuven, Leuven, Belgium
| | - Samir A Shah
- Alpert Medical School of Brown University and Miriam Hospital, Gastroenterology Associates, Providence, RI, USA
| | - Francis A Farraye
- Division of Gastroenterology and Hepatology, Mayo Clinic Florida, Jacksonville, FL, USA
| | - Revital Kariv
- Department of Gastroenterology, Tel Aviv Sourasky Medical Center and Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Xiuli Liu
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainsville, FL, USA
| | - Joel Rosh
- Department of Pediatric Gastroenterology, Goryeb Children's Hospital/Atlantic Health, Morristown, NJ, USA
| | - Shannon Chang
- Division of Gastroenterology, New York University Langone Health, New York, NY, USA
| | - Ellen Scherl
- Jill Roberts Center for IBD, Division of Gastroenterology and Hepatology, Weill Cornell Medicine, NewYork Presbytarian Hospital, New York, NY, USA
| | - David A Schwartz
- Department of Gastroenterology, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - David H Bruining
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Jessica Philpott
- Department of Gastroenterology, Hepatology and Nutrition, Cleveland Clinic, Cleveland, OH, USA
| | - Bincy Abraham
- Houston Methodist and Weill Cornell Medical College, Houston, TX, USA
| | - Jonathan Segal
- Department of Gastroenterology and Hepatology, Hillingdon Hospital, Uxbridge, UK
| | - Rocio Sedano
- Department of Medicine, Division of Gastroenterology, Western University, London, ON, Canada
| | - Maia Kayal
- Department of Gastroenterology, Icahn School of Medicine at Mount Sinai Hospital, New York, NY, USA
| | - Stuart Bentley-Hibbert
- Department of Radiology, Columbia University Irving Medical Center, NewYork Presbyterian Hospital, New York, NY, USA
| | - Dino Tarabar
- IBD Clinical Center, University Hospital Center Dr Dragiša Mišović, Belgrade, Serbia
| | - Sandra El-Hachem
- Division of Gastroenterology, Hepatology, and Nutrition, Allegheny Health Network, Pittsburgh, PA, USA
| | - Priya Sehgal
- Division of Digestive and Liver Diseases, Columbia University Irving Medical Center, NewYork Presbyterian Hospital, New York, NY, USA
| | - Joseph A Picoraro
- Department of Pediatrics, Columbia University Irving Medical Center-Morgan Stanley Children's Hospital, New York, NY, USA
| | - Séverine Vermeire
- Department of Gastroenterology, University Hospitals Leuven, Leuven, Belgium
| | - William J Sandborn
- Department of Gastroenterology, University of California San Diego, San Diego, CA, USA
| | - Mark S Silverberg
- Inflammatory Bowel Disease Centre, Mount Sinai Hospital, Toronto, ON, Canada
| | - Darrell S Pardi
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
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5
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Shen B, Kochhar GS, Kariv R, Liu X, Navaneethan U, Rubin DT, Cross RK, Sugita A, D'Hoore A, Schairer J, Farraye FA, Kiran RP, Fleshner P, Rosh J, Shah SA, Chang S, Scherl E, Pardi DS, Schwartz DA, Kotze PG, Bruining DH, Kane SV, Philpott J, Abraham B, Segal J, Sedano R, Kayal M, Bentley-Hibbert S, Tarabar D, El-Hachem S, Sehgal P, McCormick JT, Picoraro JA, Silverberg MS, Bernstein CN, Sandborn WJ, Vermeire S. Diagnosis and classification of ileal pouch disorders: consensus guidelines from the International Ileal Pouch Consortium. Lancet Gastroenterol Hepatol 2021; 6:826-849. [PMID: 34416186 DOI: 10.1016/s2468-1253(21)00101-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 12/12/2022]
Abstract
Restorative proctocolectomy with ileal pouch-anal anastomosis is an option for most patients with ulcerative colitis or familial adenomatous polyposis who require colectomy. Although the construction of an ileal pouch substantially improves patients' health-related quality of life, the surgery is, directly or indirectly, associated with various structural, inflammatory, and functional adverse sequelae. Furthermore, the surgical procedure does not completely abolish the risk for neoplasia. Patients with ileal pouches often present with extraintestinal, systemic inflammatory conditions. The International Ileal Pouch Consortium was established to create this consensus document on the diagnosis and classification of ileal pouch disorders using available evidence and the panellists' expertise. In a given individual, the condition of the pouch can change over time. Therefore, close monitoring of the activity and progression of the disease is essential to make accurate modifications in the diagnosis and classification in a timely manner.
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Affiliation(s)
- Bo Shen
- Center for Interventional Inflammatory Bowel Disease, Columbia University Irving Medical Center-New-York Presbyterian Hospital, NY, USA.
| | - Gursimran S Kochhar
- Division of Gastroenterology, Hepatology, and Nutrition, Allegheny Health Network, Pittsburgh, PA, USA
| | - Revital Kariv
- Department of Gastroenterology, Tel Aviv Sourasky Medical Center and Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Xiuli Liu
- Department of Pathology and Immunology, Washington University, MO, USA
| | - Udayakumar Navaneethan
- IBD Center and IBD Interventional Unit, Center for Interventional Endoscopy, Orlando Health, Orlando, FL, USA
| | - David T Rubin
- Inflammatory Bowel Disease Center, University of Chicago Medicine, Chicago, IL, USA
| | - Raymond K Cross
- Inflammatory Bowel Disease Program, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Akira Sugita
- Department of Clinical Research and Department of Inflammatory Bowel Disease, Yokohama Municipal Citizens Hospital Yokohama, Japan
| | - André D'Hoore
- Department of Abdominal Surgery, University Hospital Leuven, Belgium
| | - Jason Schairer
- Department of Gastroenterology, Henry Ford Health System, Detroit, MI, USA
| | - Francis A Farraye
- Division of Gastroenterology and Hepatology, Mayo Clinic Florida, Jacksonville, FL, USA
| | - Ravi P Kiran
- Division of Colorectal Surgery, Columbia University Irving Medical Center-New-York Presbyterian Hospital, NY, USA
| | - Philip Fleshner
- Division of Colorectal Surgery, University of California-Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Joel Rosh
- Department of Pediatric Gastroenterology, Goryeb Children's Hospital-Atlantic Health, Morristown, NJ, USA
| | - Samir A Shah
- Alpert Medical School of Brown University and Miriam Hospital, Gastroenterology Associates, Providence, RI, USA
| | - Shannon Chang
- Division of Gastroenterology, New York University Langone Health, New York, NY, USA
| | - Ellen Scherl
- New York Presbyterian Hospital, Jill Roberts Center for IBD, Weill Cornell Medicine, Gastroenterology and Hepatology, New York, NY, USA
| | - Darrell S Pardi
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - David A Schwartz
- Department of Gastroenterology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Paulo G Kotze
- IBD Outpatients Clinic, Catholic University of Paraná, Curitiba, Brazil
| | - David H Bruining
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Sunanda V Kane
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Jessica Philpott
- Department of Gastroenterology, Hepatology, and Nutrition, Cleveland Clinic, Cleveland, OH, USA
| | - Bincy Abraham
- Houston Methodist and Weill Cornell Medical College, Houston, TX, USA
| | - Jonathan Segal
- Department of Gastroenterology and Hepatology, Hillingdon Hospital, Uxbridge, UK
| | - Rocio Sedano
- Department of Medicine, Division of Gastroenterology, Western University, London, ON, Canada
| | - Maia Kayal
- Department of Gastroenterology, Icahn School of Medicine at Mount Sinai Hospital, New York, NY, USA
| | - Stuart Bentley-Hibbert
- Department of Radiology, Columbia University Irving Medical Center-New-York Presbyterian Hospital, NY, USA
| | - Dino Tarabar
- IBD Clinical Center, University Hospital Center Dr Dragiša Mišović, Belgrade, Serbia
| | - Sandra El-Hachem
- Division of Gastroenterology, Hepatology, and Nutrition, Allegheny Health Network, Pittsburgh, PA, USA
| | - Priya Sehgal
- Division of Digestive and Liver Diseases, Columbia University Irving Medical Center-New-York Presbyterian Hospital, NY, USA
| | - James T McCormick
- Division of Colon and Rectal Surgery, Allegheny Health Network, Pittsburgh, PA, USA
| | - Joseph A Picoraro
- Department of Pediatrics, Columbia University Irving Medical Center-Morgan Stanley Children's Hospital, New York, NY, USA
| | - Mark S Silverberg
- Mount Sinai Hospital Inflammatory Bowel Disease Centre, Toronto, ON, Canada
| | - Charles N Bernstein
- Inflammatory Bowel Disease Clinical and Research Centre, University of Manitoba, Winnipeg, MB, Canada
| | - William J Sandborn
- Department of Gastroenterology, University of California San Diego, San Diego, CA, USA
| | - Séverine Vermeire
- Department of Gastroenterology, University hospitals Leuven, Leuven, Belgium
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6
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Daskivich TJ, Houman J, Lopez M, Luu M, Fleshner P, Zaghiyan K, Cunneen S, Burch M, Walsh C, Paiement G, Kremen T, Soukiasian H, Spitzer A, Jackson T, Kim HL, Li A, Spiegel B. Association of Wearable Activity Monitors With Assessment of Daily Ambulation and Length of Stay Among Patients Undergoing Major Surgery. JAMA Netw Open 2019; 2:e187673. [PMID: 30707226 PMCID: PMC6484591 DOI: 10.1001/jamanetworkopen.2018.7673] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
IMPORTANCE Early postoperative ambulation is vital to minimizing length of stay (LOS), but few hospitals objectively measure ambulation to predict outcomes. Wearable activity monitors have the potential to transform assessment of postoperative ambulation, but key implementation data, including whether digitally monitored step count can identify patients at risk for poor efficiency outcomes, are lacking. OBJECTIVES To define the distribution of digitally measured daily step counts after major inpatient surgical procedures, to assess the accuracy of physician assessment and ordering of ambulation, and to quantify the association of digitally measured step count with LOS. DESIGN, SETTING, AND PARTICIPANTS Prospective cohort study at Cedars-Sinai Medical Center, an urban tertiary referral center. Participants were patients undergoing 8 inpatient operations (lung lobectomy, gastric bypass, hip replacement, robotic cystectomy, open colectomy, abdominal hysterectomy, sleeve gastrectomy, and laparoscopic colectomy) from July 11, 2016, to August 30, 2017. INTERVENTIONS Use of activity monitors to measure daily postoperative step count. MAIN OUTCOMES AND MEASURES Operation-specific daily step count, daily step count by physician orders and assessment, and a prolonged LOS (>70th percentile for each operation). RESULTS Among 100 patients (53% female), the mean (SD) age was 53 (18) years, and the median LOS was 4 days (interquartile range, 3-6 days). There was a statistically significant increase in daily step count with successive postoperative days in aggregate (r = 0.55; 95% bootstrapped CI, 0.47-0.62; P < .001) and across individual operations. Ninety-five percent (356 of 373) of daily ambulation orders were "ambulate with assistance," although daily step counts ranged from 0 to 7698 steps (0-5.5 km) under this order. Physician estimation of ambulation was predictive of the median step count (r = 0.66; 95% bootstrapped CI, 0.59-0.72; P < .001), although there was substantial variation within each assessment category. For example, daily step counts ranged from 0 to 1803 steps (0-1.3 km) in the "out of bed to chair" category. Higher step count on postoperative day 1 was associated with lower odds of prolonged LOS from 0 to 1000 steps (odds ratio [OR], 0.63; 95% CI, 0.45-0.84; P = .003), with no further decrease in odds after 1000 steps (OR, 0.99; 95% CI, 0.75-1.30; P = .80). CONCLUSIONS AND RELEVANCE In this study, digitally measured step count up to 1000 steps on postoperative day 1 was associated with lower probability of a prolonged LOS. Wearable activity monitors improved the accuracy of assessment of daily step count over the current standard of care, providing an opportunity to identify patients at risk for poor efficiency outcomes.
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Affiliation(s)
- Timothy J. Daskivich
- Division of Urology, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
- Cedars-Sinai Center for Outcomes Research and Education (CS-CORE), Cedars-Sinai Medical Center, Los Angeles, California
| | - Justin Houman
- Division of Urology, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Mayra Lopez
- Cedars-Sinai Center for Outcomes Research and Education (CS-CORE), Cedars-Sinai Medical Center, Los Angeles, California
| | - Michael Luu
- Division of Urology, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Philip Fleshner
- Division of Colorectal Surgery, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Karen Zaghiyan
- Division of Colorectal Surgery, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Scott Cunneen
- Division of Minimally Invasive Surgery, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Miguel Burch
- Division of Minimally Invasive Surgery, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Christine Walsh
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Guy Paiement
- Department of Orthopedic Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Thomas Kremen
- Department of Orthopedic Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Harmik Soukiasian
- Division of Thoracic Surgery, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Andrew Spitzer
- Department of Orthopedic Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Titus Jackson
- Department of Orthopedic Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Hyung L. Kim
- Division of Urology, Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
| | - Andrew Li
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California
| | - Brennan Spiegel
- Cedars-Sinai Center for Outcomes Research and Education (CS-CORE), Cedars-Sinai Medical Center, Los Angeles, California
- Division of Health Services Research, Department of Medicine, Cedars-Sinai Health System, Los Angeles, California
- Department of Health Policy and Management, UCLA Fielding School of Public Health, Los Angeles
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7
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Lightner AL, Spinelli A, McKenna NP, Hallemeier CL, Fleshner P. Does external beam radiation therapy to the pelvis portend worse ileal pouch outcomes? An international multi-institution collaborative study. Colorectal Dis 2019; 21:219-225. [PMID: 30411480 DOI: 10.1111/codi.14467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 07/23/2018] [Accepted: 10/17/2018] [Indexed: 02/08/2023]
Abstract
AIM Short-term morbidity and long-term functional outcome of patients with an ileal pouch-anal anastomosis (IPAA) exposed to pelvic external beam radiation therapy (EBRT) remains unknown. We report the largest series to date regarding the effects of pelvic EBRT on: (i) 30-day postoperative outcomes; and (ii) long-term functional outcome following IPAA. METHOD A retrospective chart review was conducted of patients who received EBRT before or after IPAA between 1980 and 2017 across three international inflammatory bowel disease referral centres. RESULTS Nineteen patients were included. Indications for EBRT were rectal adenocarcinoma (n = 13), prostate adenocarcinoma (n = 4) or anal squamous cell carcinoma (ASCC) (n = 2). EBRT was given prior to IPAA in 12 (63%) patients and after IPAA in seven (37%). In EBRT before IPAA, patients had a median of 5 (range: 4-8) daytime bowel movements, 1 (range: 0-5) night-time bowel movement, no daytime incontinence, and only one patient used pads at a median follow up of 25 (range: 11-163) months; one patient underwent pouch excision 15 months after IPAA. In EBRT after IPAA, patients reported a median of 8 (range: 5-10) daytime and 2 (range: 0-5) night-time bowel movements, 80% had either daytime or night-time incontinence and 80% used pads at a median follow up of 90 (range: 25-315) months. CONCLUSION Pelvic EBRT administered prior to IPAA is associated with acceptable long-term function outcome. However, when pelvic EBRT is given to an IPAA in situ, most patients experience poor long-term pouch function without pouch failure.
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Affiliation(s)
- A L Lightner
- Division of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - A Spinelli
- Department of Biomedical Sciences, Humanitas University, Rozzano, Italy.,Colon and Rectal Surgery Unit, Humanitas Clinical and Research Center, Rozzano, Italy
| | - N P McKenna
- Division of Colon and Rectal Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - C L Hallemeier
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, USA
| | - P Fleshner
- Division of Colon and Rectal Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
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8
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Zaghiyan K, Warusavitarne J, Spinelli A, Chandrasinghe P, Di Candido F, Fleshner P. Technical variations and feasibility of transanal ileal pouch-anal anastomosis for ulcerative colitis and inflammatory bowel disease unclassified across continents. Tech Coloproctol 2018; 22:867-873. [DOI: 10.1007/s10151-018-1889-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 11/19/2018] [Indexed: 02/06/2023]
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9
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Rezaie A, Fleshner P, Pimentel M, Zaghiyan K. Response to 'Ultrasound anal sphincter defects and 3D anal pressure defects'. Colorectal Dis 2017; 19:1031-1032. [PMID: 28980428 DOI: 10.1111/codi.13908] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 08/14/2017] [Indexed: 02/08/2023]
Affiliation(s)
- A Rezaie
- Division of Gastroenterology, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - P Fleshner
- Division of Colorectal Surgery, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - M Pimentel
- Division of Gastroenterology, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - K Zaghiyan
- Division of Colorectal Surgery, Cedars Sinai Medical Center, Los Angeles, California, USA
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10
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Kamiński JP, Zaghiyan K, Fleshner P. Increasing experience of ligation of the intersphincteric fistula tract for patients with Crohn's disease: what have we learned? Colorectal Dis 2017; 19:750-755. [PMID: 28371062 DOI: 10.1111/codi.13668] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [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: 10/12/2016] [Accepted: 12/20/2016] [Indexed: 12/13/2022]
Abstract
AIM Ligation of the intersphincteric fistula tract (LIFT) has been proposed as a treatment of trans-sphincteric fistula in perianal Crohn's disease (CD). The aim of this study was to look at our experience of the LIFT procedure in CD patients on long-term follow-up. Specifically, we aimed to determine the fistula healing rate after the LIFT procedure after more than 12 months follow-up and to identify any prognostic factors. METHOD Retrospective study of patients with trans-sphincteric Crohn's fistula tracts treated with the LIFT procedure between January 2011 and October 2015. Complete fistula healing as well as clinical outcomes were analysed. RESULTS Data were available for 23 patients. After a median follow-up of 23 months, LIFT site healing was 48%. Patients with healed LIFT had a median follow-up time of 10.5 months, while patients with failed LIFT had a median follow-up time of 31 months (P = 0.04). Median time to failure was 9 months for patients with follow-up > 1 year. Most patients failed within 1 year (9/12; 75%) of the procedure. In multi-site CD, the LIFT procedure was more likely to be successful in those with small bowel disease (P = 0.04) compared with colonic disease (P = 0.02). Other factors such as preoperative use of biological therapies, presence of a seton, previous repair attempts, fistula position, type or number of fistulas, multiple fistula tracts, smoking status and other associated perianal disease did not appear to influence LIFT healing rates. CONCLUSION The LIFT procedure offers reasonable long-term success in the treatment of perianal trans-sphincteric fistulas associated with CD. LIFT is more likely to fail in patients with concurrent colonic CD than in patients with small bowel CD.
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Affiliation(s)
- J P Kamiński
- Division of Colon and Rectal Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - K Zaghiyan
- Division of Colon and Rectal Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - P Fleshner
- Division of Colon and Rectal Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
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11
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Rezaie A, Iriana S, Pimentel M, Murrell Z, Fleshner P, Zaghiyan K. Can three-dimensional high-resolution anorectal manometry detect anal sphincter defects in patients with faecal incontinence? Colorectal Dis 2017; 19:468-475. [PMID: 27657739 DOI: 10.1111/codi.13530] [Citation(s) in RCA: 16] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 07/25/2016] [Indexed: 12/21/2022]
Abstract
AIM Endoanal ultrasound (EAUS) is the gold standard for detecting anal sphincter defects in patients with faecal incontinence (FI), while anorectal manometry evaluates sphincter function. Three-dimensional high-resolution anorectal manometry (3D HRAM) is a newer modality with the potential to assess both sphincter function and anatomy. The purpose of the present study was to compare 3D HRAM with 3D EAUS for the detection of anal sphincter defects in patients with FI. METHOD A linkage analysis was performed between the 3D HRAM and 3D EAUS databases of a tertiary referral centre to identify patients with FI who underwent both 3D EAUS and 3D HRAM. With 3D HRAM, a defect was defined as any pressure measurement below 25 mmHg at rest with at least 18° of continuous expansion. The 3D HRAM findings were compared with those of 3D EAUS. RESULTS The study cohort included 39 patients with a mean age of 64.7 ± 15.2 years (SD); and 31 (79%) were female. Eight (21%) patients had an anal sphincter defect on EAUS with a median size of 93° (range 40°-136°). Fourteen (36%) had a defect shown by 3D HRAM with a median size of 144° (36°-180°). The sensitivity, specificity and positive and negative predictive values of 3D HRAM in detecting a sphincter defect were 75%, 74%, 43% and 92%, respectively. CONCLUSION With a negative predictive value of 92%, 3D HRAM may be a useful screening method for ruling out a sphincter defect in patients with FI, thereby avoiding both EAUS and manometry in selected patients.
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Affiliation(s)
- A Rezaie
- Division of Gastroenterology, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - S Iriana
- Department of Internal Medicine, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - M Pimentel
- Division of Gastroenterology, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - Z Murrell
- Division of Colorectal Surgery, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - P Fleshner
- Division of Colorectal Surgery, Cedars Sinai Medical Center, Los Angeles, California, USA
| | - K Zaghiyan
- Division of Colorectal Surgery, Cedars Sinai Medical Center, Los Angeles, California, USA
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12
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Rivas MA, Graham D, Sulem P, Stevens C, Desch AN, Goyette P, Gudbjartsson D, Jonsdottir I, Thorsteinsdottir U, Degenhardt F, Mucha S, Kurki MI, Li D, D'Amato M, Annese V, Vermeire S, Weersma RK, Halfvarson J, Paavola-Sakki P, Lappalainen M, Lek M, Cummings B, Tukiainen T, Haritunians T, Halme L, Koskinen LLE, Ananthakrishnan AN, Luo Y, Heap GA, Visschedijk MC, MacArthur DG, Neale BM, Ahmad T, Anderson CA, Brant SR, Duerr RH, Silverberg MS, Cho JH, Palotie A, Saavalainen P, Kontula K, Färkkilä M, McGovern DPB, Franke A, Stefansson K, Rioux JD, Xavier RJ, Daly MJ, Barrett J, de Lane K, Edwards C, Hart A, Hawkey C, Jostins L, Kennedy N, Lamb C, Lee J, Lees C, Mansfield J, Mathew C, Mowatt C, Newman B, Nimmo E, Parkes M, Pollard M, Prescott N, Randall J, Rice D, Satsangi J, Simmons A, Tremelling M, Uhlig H, Wilson D, Abraham C, Achkar JP, Bitton A, Boucher G, Croitoru K, Fleshner P, Glas J, Kugathasan S, Limbergen JV, Milgrom R, Proctor D, Regueiro M, Schumm PL, Sharma Y, Stempak JM, Targan SR, Wang MH. A protein-truncating R179X variant in RNF186 confers protection against ulcerative colitis. Nat Commun 2016; 7:12342. [PMID: 27503255 PMCID: PMC4980482 DOI: 10.1038/ncomms12342] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 06/24/2016] [Indexed: 01/05/2023] Open
Abstract
Protein-truncating variants protective against human disease provide in vivo validation of therapeutic targets. Here we used targeted sequencing to conduct a search for protein-truncating variants conferring protection against inflammatory bowel disease exploiting knowledge of common variants associated with the same disease. Through replication genotyping and imputation we found that a predicted protein-truncating variant (rs36095412, p.R179X, genotyped in 11,148 ulcerative colitis patients and 295,446 controls, MAF=up to 0.78%) in RNF186, a single-exon ring finger E3 ligase with strong colonic expression, protects against ulcerative colitis (overall P=6.89 × 10(-7), odds ratio=0.30). We further demonstrate that the truncated protein exhibits reduced expression and altered subcellular localization, suggesting the protective mechanism may reside in the loss of an interaction or function via mislocalization and/or loss of an essential transmembrane domain.
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Affiliation(s)
- Manuel A. Rivas
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Daniel Graham
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | | | - Christine Stevens
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - A. Nicole Desch
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - Philippe Goyette
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
| | - Daniel Gudbjartsson
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- School of Engineering and Natural Sciences, University of Iceland, 101 Reykjavik, Iceland
| | - Ingileif Jonsdottir
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Department of Immunology, Landspitali, the National University Hospital of Iceland, 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Unnur Thorsteinsdottir
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Frauke Degenhardt
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Sören Mucha
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Mitja I. Kurki
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Dalin Li
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, 14183 Stockholm, Sweden
- BioCruces Health Research Institute and IKERBASQUE, Basque Foundation for Science, 48903 Bilbao, Spain
| | - Vito Annese
- Unit of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico-Casa Sollievo della Sofferenza (IRCCS-CSS) Hospital, 71013 San Giovanni Rotondo, Italy
- Strutture Organizzative Dipartimentali (SOD) Gastroenterologia 2, Azienda Ospedaliero Universitaria (AOU) Careggi, 50134 Florence, Italy
| | - Severine Vermeire
- Department of Clinical and Experimental Medicine, Translational Research in GastroIntestinal Disorders (TARGID), Katholieke Universiteit (KU) Leuven, Leuven 3000, Belgium
- Division of Gastroenterology, University Hospital Gasthuisberg, BE-3000 Leuven, Belgium
| | - Rinse K. Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Jonas Halfvarson
- Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, SE 701 82 Örebro, Sweden
| | - Paulina Paavola-Sakki
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Clinic of Gastroenterology, Helsinki University Hospital, 00100 Helsinki, Finland
| | - Maarit Lappalainen
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Research Programs Unit, Immunobiology, and Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland
| | - Monkol Lek
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Beryl Cummings
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Taru Tukiainen
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Leena Halme
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - Lotta L. E. Koskinen
- Research Programs Unit, Immunobiology, and Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland
- Department of Medical Genetics, Biomedicum Helsinki, University of Helsinki, 00100 Helsinki, Finland
| | - Ashwin N. Ananthakrishnan
- Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Division of Medical Sciences, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Yang Luo
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK
| | - Graham A. Heap
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - Marijn C. Visschedijk
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Daniel G. MacArthur
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Benjamin M. Neale
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Tariq Ahmad
- Peninsula College of Medicine and Dentistry, Exeter PL6 8BU, UK
| | - Carl A. Anderson
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK
| | - Steven R. Brant
- Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, 21205, USA
| | - Richard H. Duerr
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania 15261, USA
| | - Mark S. Silverberg
- Department of Medicine, Inflammatory Bowel Disease Centre, Mount Sinai Hospital, Toronto, Ontario, Canada M5G 1X5
| | - Judy H Cho
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - Aarno Palotie
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Institute for Molecular Medicine Finland, University of Helsinki, 00100 Helsinki, Finland
- Massachusetts General Hospital, Center for Human Genetic Research, Psychiatric and Neurodevelopmental Genetics Unit, Boston, Massachusetts 02114, USA
| | - Päivi Saavalainen
- Research Programs Unit, Immunobiology, University of Helsinki, 00100 Helsinki, Finland
| | - Kimmo Kontula
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
| | - Martti Färkkilä
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Clinic of Gastroenterology, Helsinki University Hospital, 00100 Helsinki, Finland
| | - Dermot P. B. McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Kari Stefansson
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - John D. Rioux
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
- Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada H3T 1J4
| | - Ramnik J. Xavier
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Mark J. Daly
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - J. Barrett
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - K. de Lane
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - C. Edwards
- Department of Gastroenterology, Torbay Hospital, Devon, UK
| | - A. Hart
- Department of Medicine, St. Mark's Hospital, Middlesex, UK
| | - C. Hawkey
- Nottingham Digestive Disease Centre, Queens Medical Centre, Nottingham, UK
| | - L. Jostins
- Wellcome Trust Centre for Human Genetics, University of Oxford, Headington, UK
- Christ Church, University of Oxford, Oxford, UK
| | - N. Kennedy
- Gastrointestinal Unit, Wester General Hospital, University of Edinburgh, Edinburgh, UK
| | - C. Lamb
- Newcastle University, Newcastle upon Tyne, UK
| | - J. Lee
- Inflammatory Bowel Disease Research Group, Addenbrooke's Hospital, Cambridge, UK
| | - C. Lees
- Gastrointestinal Unit, Wester General Hospital, University of Edinburgh, Edinburgh, UK
| | | | - C. Mathew
- Department of Medical and Molecular Genetics, Guy's Hospital, London, UK
- Department of Medical and Molecular Genetics, King's College London School of Medicine, Guy's Hospital, London, UK
| | - C. Mowatt
- Department of Medicine, Ninewells Hospital and Medical School, Dundee, UK
| | - B. Newman
- Genetic Medicine, Manchester Academic Health Science Centre, Manchester, UK
- The Manchester Centre for Genomic Medicine, University of Manchester, Manchester, UK
| | - E. Nimmo
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - M. Parkes
- Inflammatory Bowel Disease Research Group, Addenbrooke's Hospital, Cambridge, UK
| | - M. Pollard
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - N. Prescott
- Department of Medical and Molecular Genetics, Guy's Hospital, London, UK
- Department of Medical and Molecular Genetics, King's College London School of Medicine, Guy's Hospital, London, UK
| | - J. Randall
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - D. Rice
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - J. Satsangi
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - A. Simmons
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
- Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - M. Tremelling
- Gastroenterology & General Medicine, Norfolk and Norwich University Hospital, Norwich, UK
| | - H. Uhlig
- Translational Gastroenterology Unit and the Department of Pediatrics, University of Oxford, Oxford, UK
| | - D. Wilson
- Pediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, UK
- Child Life and Health, University of Edinburgh, Edinburgh, UK
| | - C. Abraham
- Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - J. P. Achkar
- Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - A. Bitton
- Division of Gastroenterology, Royal Victoria Hospital, Montréal, Québec, Canada
| | - G. Boucher
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
| | - K. Croitoru
- Inflammatory Bowel Disease Group, Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - P. Fleshner
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - J. Glas
- Division of Gastroenterology, Royal Victoria Hospital, Montréal, Québec, Canada
| | - S. Kugathasan
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - J. V. Limbergen
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, Toronto, Ontario, Canada
| | - R. Milgrom
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - D. Proctor
- Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - M. Regueiro
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania 15261, USA
| | - P. L. Schumm
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Y. Sharma
- Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - J. M. Stempak
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - S. R. Targan
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - M. H. Wang
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
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13
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Abstract
BACKGROUND Although postoperative ileus (POI) is a common complication after major abdominal colorectal surgery, it is unknown whether a history of POI predisposes to recurrent POI in subsequent surgeries. In the present retrospective case-control study, conducted at the colorectal surgery division of a tertiary care center, we attempted to identify factors that may predict recurrent POI in ulcerative colitis (UC) patients undergoing three-stage ileal pouch-anal anastomosis (IPAA). METHODS Charts of UC patients undergoing three-stage IPAA were reviewed. All patients received a standardized accelerated postoperative care pathway. Patients were assigned to one of 3 categories: Group A patients did not have POI after either initial subtotal colectomy (STC) or subsequent IPAA, Group B patients developed POI only after initial STC, and Group C patients developed POI after both STC and IPAA. RESULTS The study group consisted of 91 patients. There were 71 (78 %) patients in Group A, 14 (15 %) patients in Group B, and 6 (7 %) patients in group C. There was no significant difference in any demographic or clinical features among patients that developed no POI, those that developed POI only after STC, and those that developed POI after both STC and IPAA. CONCLUSIONS POI is difficult to predict after first- and second-stage IPAA. Clinical factors and a history of POI from first-stage IPAA do not predict POI after second-stage IPAA. Patients with a history of POI after STC do not have an increased risk of developing recurrent POI.
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Affiliation(s)
- Q Le
- Division of Colorectal Surgery, Cedars-Sinai Medical Center, 8737 Beverly Boulevard, Suite 101, Los Angeles, CA 90048, USA
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14
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Manookian CM, Fleshner P, Moore B, Teng F, Cooperman H, Sokol T. Topical nitroglycerin in the management of anal fissure: an explosive outcome! Am Surg 1998; 64:962-4. [PMID: 9764702] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Anal sphincter spasm is a common finding in patients with anal fissure disease. It is postulated that spasm impedes mucosal blood flow and impairs healing. Topical nitroglycerin (NTG), a nitric oxide donor compound, has been shown to cause relaxation of the anal sphincter and may have treatment efficacy in the management of anal fissure. The purpose of this study was to assess the usefulness of NTG for anal fissure. We performed a retrospective review of patients with anal fissure treated with various concentrations of topical NTG ointments over an 18-month period ending July 1997. Of the 81 patients studied, 44 (54%) were male. There were 42 acute and 39 chronic fissures. NTG preparations included 1 per cent isosorbide (n = 37), 0.2 per cent NTG (n = 38), and 0.5 per cent NTG (n = 6). Healing with NTG therapy occurred in 29 acute (69%) and 21 chronic fissure (54%) patients. There was no difference in the incidence of healing of acute or chronic fissure between the various NTG treatment preparation groups. When acute and chronic fissure therapy was subdivided by time of NTG treatment (immediate versus post-conservative therapy failure (PCF)), 14 (74%) of acute PCF and 5 (42%) of chronic PCF patients healed. We conclude that no single formula was superior. When patients were subdivided into a PCF group, NTG therapy demonstrated a significant salvage rate, thus avoiding surgery.
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Affiliation(s)
- C M Manookian
- Division of Colon and Rectal Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA
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15
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Abstract
Extramucosal microscopic residual disease (MRD) at the bronchial resection margin was identified in 45 (1.6%) of 2,890 patients who underwent resection of primary non-small cell lung cancer between 1975 and 1985. In 9 of these patients, residual tumor was confined to submucosal lymphatics, whereas in the other 36, MRD was found in peribronchial soft tissue. All patients underwent complete mediastinal lymphadenectomy. Three patients had stage I disease, 3 had stage II, 33 had stage IIIa, 4 had stage IIIb, and 2 had stage IV. Recurrent disease developed in 34 (81%) of the evaluable patients; the recurrence was local in 11 (32%). Median time from operation to diagnosis of local recurrence was 8 months. Sixty percent of the recurrences in the N0 group were local, and only 23% of those in the N2 group were local. Extramucosal MRD is most frequently associated with advanced-stage disease. Postoperative therapy had no effect on the development of recurrent disease. We found no difference in survival between patients whose initial site of recurrence was local as opposed to distant. Median survival after the identification of either local or distant recurrence was 5 months. The finding of extramucosal MRD identifies a subset of patients with a poorer prognosis compared with those with clear resection margins.
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Affiliation(s)
- L R Kaiser
- Thoracic Surgery Service, Memorial Sloan-Kettering Cancer Center, New York, New York
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16
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Abstract
A retrospective review of 922 colorectal cancer patients was undertaken to determine whether the nonuniform anatomic distribution of colorectal cancer was influenced by age and/or sex. The mean age of patients with right colon lesions (71.2 years) was significantly higher than for either patients with left colon lesions (68.2 years) or rectal lesions (65.6 years). Further analysis disclosed that patients with proximal tumors were older than patients with distal tumors primarily because of the later presentation of females with cecal or ascending colon cancers. Comparison of the anatomic distribution of tumors in patient groups above and below the age of 70 revealed that right colon cancers accounted for a greater percentage of colorectal tumors in the older patient group than in the younger patient group. These findings support the roles played by both age and sex in influencing colorectal cancer location. Furthermore, these data provide a plausible explanation for the increasing incidence of proximal colonic lesions.
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Affiliation(s)
- P Fleshner
- Department of Surgery, Mount Sinai School of Medicine of the City University of New York, New York 10029
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17
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Slater G, Fleshner P, Aufses AH. Colorectal cancer location and synchronous adenomas. Am J Gastroenterol 1988; 83:832-6. [PMID: 3394686] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this study, the relationship between the location of colorectal cancer and synchronous benign adenomas was assessed in 591 patients. Adenomas were found in 29.7% of all patients. Patients with cancer of the cecum, ascending colon, and hepatic flexure had the highest percentage of benign adenomas. Patients with right-sided cancer had adenomas in 47% of resected specimens, which percentage was significantly higher than that in the group of patients with left-sided cancer, who had adenomas in 22% of their specimens (p less than 0.001). Patients with cancer and synchronous adenomas were also older (70.2 vs 67.8, p less than 0.02) and more likely to be male (p less than 0.002) than patients with cancer and no adenomas. It is suggested that efforts be made to identify adenomas preoperatively in patients with colorectal cancer. In addition, since patients with cancer and associated adenomas are at increased risk of developing metachronous cancer, the group with right-sided cancer should be part of a particularly active surveillance program.
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Affiliation(s)
- G Slater
- Department of Surgery, Mount Sinai School of Medicine, City University of New York, New York
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18
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Abstract
We have investigated the ability of chemically deglycosylated ovine pituitary lutropin (DGLH) to stimulate cyclic AMP accumulation in rat interstitial cells in vitro. In sharp contrast to the native hormone which brought about a large increase in cyclic AMP levels, no significant response was indiced by DGLH even in the presence of the phosphodiesterase inhibitor, isobutyl methylxanthine. On the contrary, all preparations of DGLH tested were potent inhibitors of the action of the native hormone. The concentration of DGLH for inhibition of LH-induced cyclic AMP response was significantly lower than that required for inhibition of steroidogenesis. While inhibition of hormone-induced cyclic AMP response was complete, the inhibition of steroidogenesis in testicular cells by DGLH approached about 70-80%. Accumulation of cycli AMP induced by hCG was also effectively inhibited by DGLH suggesting that its inhibitory action is mediated via its binding to lutropin receptor(s) on interstitial cells. A recombinant of deglycosylated subunits, DG alpha + DG beta, had properties identical to that of DGLH.
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