CONTACT INFORMATION

Thomas Schnell
Thomas Schnell
M.D.
Professor
Gastroenterology
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Specialties
Heartburn, Stomach Cancer, Esophagus Cancer, Colon Cancer, Reflux Disease
Locations
Loyola Outpatient Center
Edward Hines, Jr. VA Hospital
Board Certifications
Gastroenterology - Subspecialty Cert: AM Board of Internal Medicine
Internal Medicine - General Cert: AM Board of Internal Medicine
Publications
Non-cardiac chest pain: the long-term natural history and comparison with gastroesophageal reflux disease.Williams,J. F.; Sontag,S. J.; Schnell,T.; Leya,J.AMERICAN JOURNAL OF GASTROENTEROLOGY 2009 ;104(9):2145-2152
Does Hypogonadism Affect Self-Reported Sexuality in Men with COPD?Langston,M.; Collins,E.; Doud,M.; Schnell,T. G.; Tobin,M. J.; Laghi,F.American Journal of Respiratory & Critical Care Medicine 2009 ;179(4):A1461
Five-year colon surveillance after screening colonoscopyLieberman,D. A.; Weiss,D. G.; Harford,W. V.; Ahnen,D. J.; Provenzale,D.; Sontag,S. J.; Schnell,T. G.; Chejfec,G.; Campbell,D. R.; Kidao,J.; Bond,J. H.; Nelson,D. B.; Triadafilopoulos,G.; Ramirez,F. C.; Collins,J. F.; Johnston,T. K.; McQuaid,K. R.; Garewal,H.; Sampliner,R. E.; Esquivel,R.; Robertson,D.GASTROENTEROLOGY 2007 ;133(4):1077-1085
The long-term natural history of gastroesophageal reflux diseaseSontag,S. J.; Sonnenberg,A.; Schnell,T. G.; Leya,J.; Metz,A.JOURNAL OF CLINICAL GASTROENTEROLOGY 2006 ;40(5):398-404
Asthmatics with gastroesophageal reflux: long term results of a randomized trial of medical and surgical antireflux therapiesSontag,S. J.; O'Connell,S.; Khandelwal,S.; Greenlee,H.; Schnell,T.; Nemchausky,B.; Chejfec,G.; Miller,T.; Seidel,J.; Sonnenberg,A.AMERICAN JOURNAL OF GASTROENTEROLOGY 2003 ;98(5):987-999
Hiatal hernia size, Barrett's length, and severity of acid reflux are all risk factors for esophageal adenocarcinoma.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Chejfec,G.; Metz,A.; Sontag,S. J.AMERICAN JOURNAL OF GASTROENTEROLOGY 2002 ;97(8):1930-1936
New occurrence and recurrence of neoplasms within 5 years of a screening colonoscopy.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Leya,J.; Metz,A.; Sontag,S. J.AMERICAN JOURNAL OF GASTROENTEROLOGY 2002 ;97(6):1524-1529
Acid reflux is a poor predictor for severity of erosive reflux esophagitis.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.Digestive Diseases & Sciences 2002 ;47(11):2565-2573
Hiatal hernia and acid reflux frequency predict presence and length of Barrett's esophagus.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.Digestive Diseases & Sciences 2002 ;47(2):256-264
There are no reliable symptoms for erosive oesophagitis and Barrett's oesophagus: endoscopic diagnosis is still essential.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.ALIMENTARY PHARMACOLOGY & THERAPEUTICS 2002 ;16(4):735-742
Inguinal hernia is not a sign of colon cancer: results of a prospective screening trial.Avidan,B.; Sonnenberg,A.; Bhatia,H.; Aranha,G.; Schnell,T. G.; Sontag,S. J.ALIMENTARY PHARMACOLOGY & THERAPEUTICS 2002 ;16(6):1197-1201
Long-term outcome of medical and surgical therapies for gastroesophageal reflux disease: follow-up of a randomized controlled trialSpechler,S. J.; Lee,E.; Ahnen,D.; Goyal,R. K.; Hirano,I.; Ramirez,F.; Raufman,J. P.; Sampliner,R.; Schnell,T.; Sontag,S.; Vlahcevic,Z. R.; Young,R.; Williford,W.JAMA 2001 ;285(18):2331-2338
Reduced symptoms and need for antisecretory therapy in veterans 3 years after Helicobacter pylori eradication with ranitidine bismuth citrate/amoxicillin/clarithromycin.Sontag,S. J.; O'Connell,S.; Schnell,T.; Chejfec,G.; Seidel,J.; Sonnenberg,A.AMERICAN JOURNAL OF GASTROENTEROLOGY 2001 ;96(5):1390-1395
Long-term nonsurgical management of Barrett's esophagus with high-grade dysplasiaSchnell,T. G.; Sontag,S. J.; Chejfec,G.; Aranha,G.; Metz,A.; O'Connell,S.; Seidel,U. J.; Sonnenberg,A.GASTROENTEROLOGY 2001 ;120(7):1607-1619
Gastric surgery is not a risk for Barrett's esophagus or esophageal adenocarcinomaAvidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.GASTROENTEROLOGY 2001 ;121(6):1281-1285
No association between gallstones and gastroesophageal reflux disease.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.AMERICAN JOURNAL OF GASTROENTEROLOGY 2001 ;96(10):2858-2862
Risk factors for erosive reflux esophagitis: a case-control study.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.AMERICAN JOURNAL OF GASTROENTEROLOGY 2001 ;96(1):41-46
Temporal associations between coughing or wheezing and acid reflux in asthmatics.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.GUT 2001 ;49(6):767-772
Is there a link between cervical inlet patch and Barrett's esophagus?.Avidan,B.; Sonnenberg,A.; Chejfec,G.; Schnell,T. G.; Sontag,S. J.GASTROINTESTINAL ENDOSCOPY 2001 ;53(7):717-721
Risk factors of oesophagitis in arthritic patients.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Budiman-Mak,E.; Sontag,S. J.EUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY 2001 ;13(9):1095-1099
Walking and chewing reduce postprandial acid reflux.Avidan,B.; Sonnenberg,A.; Schnell,T. G.; Sontag,S. J.ALIMENTARY PHARMACOLOGY & THERAPEUTICS 2001 ;15(2):151-155
Lansoprazole heals erosive reflux oesophagitis in patients with Barrett's oesophagus.Sontag,S. J.; Schnell,T. G.; Chejfec,G.; Kurucar,C.; Karpf,J.; Levine,G.ALIMENTARY PHARMACOLOGY & THERAPEUTICS 1997 ;11(1):147-156
Mucosal reactive oxygen species production in oesophagitis and Barrett's oesophagus.Olyaee,M.; Sontag,S.; Salman,W.; Schnell,T.; Mobarhan,S.; Eiznhamer,D.; Keshavarzian,A.GUT 1995 ;37(2):168-173
Healing of NSAID-induced gastric ulcers with a synthetic prostaglandin analog (enprostil).Sontag,S. J.; Schnell,T. G.; Budiman-Mak,E.; Adelman,K.; Fleischmann,R.; Cohen,S.; Roth,S. H.; Ipe,D.; Schwartz,K. E.AMERICAN JOURNAL OF GASTROENTEROLOGY 1994 ;89(7):1014-1020
Fecal occult blood testing: a false sense of security?.Schnell,T.; Aranha,G. V.; Sontag,S. J.; Tode,R.; Reid,S.; Chejfec,G.; Karpf,J.; Levine,G.SURGERY 1994 ;116(4):798-802
Barrett's esophagus. A preneoplastic disorderChevfec,G.; Schnell,T.; Sontag,S.AMERICAN JOURNAL OF CLINICAL PATHOLOGY 1992 ;98(1):5-7
Maintenance therapy for peptic ulcer disease: an overview of medical treatmentSchnell,T. G.Journal of the Association for Academic Minority Physicians 1992 ;3(4):123-129
Adenocarcinomas arising in tongues or short segments of Barrett's esophagus.Schnell,T. G.; Sontag,S. J.; Chejfec,G.Digestive Diseases & Sciences 1992 ;37(1):137-143
Prevalence of oesophagitis in asthmatics.Sontag,S. J.; Schnell,T. G.; Miller,T. Q.; Khandelwal,S.; O'Connell,S.; Chejfec,G.; Greenlee,H.; Seidel,U. J.; Brand,L.GUT 1992 ;33(7):872-876
Barrett's esophagus. The cytology of dysplasia in comparison to benign and malignant lesions.Wang,H. H.; Doria,M. I.,Jr; Purohit-Buch,S.; Schnell,T.; Sontag,S.; Chejfec,G.ACTA CYTOLOGICA 1992 ;36(1):60-64
The importance of hiatal hernia in reflux esophagitis compared with lower esophageal sphincter pressure or smokingSontag,S. J.; Schnell,T. G.; Miller,T. Q.; Nemchausky,B.; Serlovsky,R.; O'Connell,S.; Chejfec,G.; Seidel,U. J.; Brand,L.JOURNAL OF CLINICAL GASTROENTEROLOGY 1991 ;13(6):628-643
Colon-cancer screening in dialysis patients.Ajam,M.; Ramanujam,L. S.; Gandhi,V. C.; Leehey,D. J.; Ing,T. S.; Schnell,T. G.; Daugirdas,J. T.ARTIFICIAL ORGANS 1990 ;14(2):95-97
Effect of positions, eating, and bronchodilators on gastroesophageal reflux in asthmatics.Sontag,S. J.; O'Connell,S.; Khandelwal,S.; Miller,T.; Nemchausky,B.; Schnell,T. G.; Serlovsky,R.Digestive Diseases & Sciences 1990 ;35(7):849-856
Most asthmatics have gastroesophageal reflux with or without bronchodilator therapySontag,S. J.; O'Connell,S.; Khandelwal,S.; Miller,T.; Nemchausky,B.; Schnell,T. G.; Serlovsky,R.GASTROENTEROLOGY 1990 ;99(3):613-620
Is gastroesophageal reflux a factor in some asthmatics?.Sontag,S.; O'Connell,S.; Greenlee,H.; Schnell,T.; Chintam,R.; Nemchausky,B.; Chejfec,G.; Van Drunen,M.; Wanner,J.AMERICAN JOURNAL OF GASTROENTEROLOGY 1987 ;82(2):119-126
Barrett's oesophagus and colonic tumours.Sontag,S. J.; Schnell,T. G.; Chejfec,G.; O'Connell,S.; Stanley,M. M.; Best,W.; Chintam,R.; Nemchausky,B.; Wanner,J.; Moroni,B.LANCET 1985 ;1(8435):946-949
Education
Medical School
University of Minnesota Medical School
Residency
VA Medical Center, Hines, Internal Medicine: General
Fellowship
VA Medical Center, Hines, Internal Medicine: Gastroenterology