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Yutaka Tomizawa, MD, MS
Clinical Assistant Professor

Dr.Tomizawa is a board certified gastroenterologist at UW Medicine's Harborview Medical Center and a clinical assistant professor of medicine at the University of Washington. He performs advanced endoscopic procedures including endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP), radiofrequency ablation (RFA), endoluminal stenting, complex stricture remediation and small bowel enteroscopy. He also offers standard endoscopic procedures such as upper endoscopy and colonoscopy. Dr.Tomizawa specializes in early detection and endoscopic management of gastrointestinal cancers of esophagus, stomach, pancreas, bile duct and colon.

Dr.Tomizawa completed his formal GI training in Japan before moving to the U.S., with a focus on the endoscopic management of early gastrointestinal cancer. While in Japan, he had the privilege of working with some of the world leading expertise in advanced endoscopy and having trained with endoscopic submucosal dissection (ESD).
Dr. Tomizawa received his M.D. degree from the Tokyo Medical University. He did his residency in internal medicine at the University of Pittsburgh and fellowship in gastroenterology at the University of Chicago where he also earned the degree of Master of Science (M.S.) in Clinical Research. He received additional specialized fellowship training in advanced endoscopy at the University of Pennsylvania where he worked with the premier advanced endoscopists in the country.
Recent Publications
Displaying 20 Most Recent Publications from PubMed

May 2019. Incidence of Advanced Colorectal Neoplasia in Individuals With Untreated Diminutive Colorectal Adenomas Diagnosed by Magnifying Image-Enhanced Endoscopy. Sekiguchi M, Otake Y, Kakugawa Y, Matsumoto M, Tomizawa Y, Saito Y, Matsuda T. Am J Gastroenterol. 2019 May 10. doi: 10.14309/ajg.0000000000000261. [Epub ahead of print]

April 2019. An Unusual Cause of Abdominal Pain. Baxi AC, Swanson PE, Tomizawa Y. Gastroenterology. 2019 Apr 11. pii: S0016-5085(19)35688-4. doi: 10.1053/j.gastro.2019.04.008. [Epub ahead of print]

February 2019. Clinical significance of colorectal polyp detection on colonoscopy insertion. Sakamoto T, Ramaraj R, Tomizawa Y, Cho H, Matsuda T, Saito Y. United European Gastroenterol J. 2019 Feb;7(1):125-129. doi: 10.1177/2050640618809263. Epub 2018 Oct 18.

November 2018. Low Frequency of Lymph Node Metastases in Patients in the United States With Early-stage Gastric Cancers That Fulfill Japanese Endoscopic Resection Criteria. Hanada Y, Choi AY, Hwang JH, Draganov PV, Khanna L, Sethi A, Bartel MJ, Goel N, Abe S, De Latour RA, Park K, Melis M, Newman E, Hatzaras I, Reddy SS, Farma JM, Liu X, Schlachterman A, Kresak J, Trapp G, Ansari N, Schrope B, Lee JY, Dhall D, Lo S, Jamil LH, Burch M, Gaddam S, Gong Y, Del Portillo A, Tomizawa Y, Truong CD, Brewer Gutierrez OI, Montgomery E, Johnston FM, Duncan M, Canto M, Ahuja N, Lennon AM, Ngamruengphong S. Clin Gastroenterol Hepatol. 2018 Nov 21. pii: S1542-3565(18)31274-6. doi: 10.1016/j.cgh.2018.11.031. [Epub ahead of print]

November 2018. Endoscopic Resection of Duodenal Carcinoid Tumors: A Single-Center Comparison Between Simple Polypectomy and Endoscopic Mucosal Resection. Mahmud N, Tomizawa Y, Stashek K, Katona BW, Ginsberg GG, Metz DC. Pancreas. 2018 Nov 17. doi: 10.1097/MPA.0000000000001197. [Epub ahead of print]

March 2018. Efficacy, Durability, and Safety of Complete Endoscopic Mucosal Resection of Barrett Esophagus: A Systematic Review and Meta-Analysis. Tomizawa Y, Konda VJ, Coronel E, Chapman CG, Siddiqui UD. J Clin Gastroenterol. 2018 Mar;52(3):210-216. doi: 10.1097/MCG.0000000000000800.

February 2018. Preoperative Right-Sided Cardiac Congestion Is Associated with Gastrointestinal Bleeding in Patients with Continuous-Flow Left Ventricular Assist Devices. Tomizawa Y, Tanaka A, Kitahara H, Sakuraba A, Uriel N, Jeevanandam V, Ota T. Dig Dis Sci. 2018 Feb 8. doi: 10.1007/s10620-018-4916-8. [Epub ahead of print]

January 2018. Clinical outcome of endoscopic mucosal resection of sporadic, nonampullary duodenal adenoma: a 10-year retrospective. Tomizawa Y, Ginsberg GG. Gastrointest Endosc. 2018 Jan 6. pii: S0016-5107(18)30013-0. doi: 10.1016/j.gie.2017.12.026. [Epub ahead of print]

December 2017. Periduodenal Mass: A Rare Diagnosis Confirmed by Endoscopic Ultrasound-Guided Fine-Needle Aspiration. Tomizawa Y, Yu GH, Kochman ML. Gastroenterology. 2017 Dec;153(6):1488-1489. doi: 10.1053/j.gastro.2017.05.035. Epub 2017 Nov 2.

August 2017. Efficacy of Pharmacologic Therapy for Eosinophilic Esophagitis: A Systematic Review and Network Meta-Analysis. Tomizawa Y, Melek J, Komaki Y, Kavitt RT, Sakuraba A. J Clin Gastroenterol. 2017 Aug 4. doi: 10.1097/MCG.0000000000000878. [Epub ahead of print]

May 2016. Altered Bowel Movements: A Rare Rectal Lesion. Tomizawa Y, Alpert L, Siddiqui UD. Gastroenterology. 2016 May;150(5):1092-1093. doi: 10.1053/j.gastro.2016.01.043. Epub 2016 Mar 25.

November 2015. A Rare Cause of Diarrhea and Weight Loss. Tomizawa Y, Zhao L. Am J Gastroenterol. 2015 Nov;110(11):1534. doi: 10.1038/ajg.2015.71.

October 2015. Image of the Month. A polypoid lesion in the stomach: atypical endoscopic appearance and a rare cause. Tomizawa Y. Am J Gastroenterol. 2015 Oct;110(10):1395. doi: 10.1038/ajg.2015.69.

June 2015. A rare cause of diarrhea and weight loss. Tomizawa Y, Van Slambrouck C, Kavitt RT. Gastroenterology. 2015 Jun;148(7):1288-9. doi: 10.1053/j.gastro.2015.01.047. Epub 2015 Apr 30.

September 2014. Nausea, vomiting, and weight loss: common symptoms of an uncommon disease. Tomizawa Y, Zhao L, Yang LW. Gastroenterology. 2014 Sep;147(3):573-4. doi: 10.1053/j.gastro.2014.04.056. Epub 2014 Jul 23.

July 2014. Parastomal Variceal Bleeding Attributed to Obstructive Pathology Successfully Treated by Percutaneous Variceal Embolization. Tomizawa Y, Sakuraba A, Pekow J. ACG Case Rep J. 2014 Jul 8;1(4):217-9. doi: 10.14309/crj.2014.58. eCollection 2014 Jul.

April 2014. The risk of endoscopic mucosal resection in the setting of clopidogrel use. Namasivayam V, Prasad GA, Lutzke LS, Dunagan KT, Borkenhagen LS, Okoro NI, Tomizawa Y, Buttar NS, Michel WL, Wang KK. ISRN Gastroenterol. 2014 Apr 27;2014:494157. doi: 10.1155/2014/494157. eCollection 2014.

April 2014. Enhanced mucosal imaging and the esophagus--ready for prime time? Tomizawa Y, Waxman I. Curr Gastroenterol Rep. 2014;16(6):389. doi: 10.1007/s11894-014-0389-x. Review.

February 2014. Combined interventional radiology followed by endoscopic therapy as a single procedure for patients with failed initial endoscopic biliary access. Tomizawa Y, Di Giorgio J, Santos E, McCluskey KM, Gelrud A. Dig Dis Sci. 2014 Feb;59(2):451-8. doi: 10.1007/s10620-013-2913-5. Epub 2013 Nov 24.

February 2014. Single balloon enteroscopy (SBE) assisted therapeutic endoscopic retrograde cholangiopancreatography (ERCP) in patients with roux-en-y anastomosis. Tomizawa Y, Sullivan CT, Gelrud A. Dig Dis Sci. 2014 Feb;59(2):465-70. doi: 10.1007/s10620-013-2916-2. Epub 2013 Nov 2.

December 2013. Assessment of the diagnostic performance and interobserver variability of endocytoscopy in Barrett's esophagus: a pilot ex-vivo study. Tomizawa Y, Iyer PG, Wongkeesong LM, Buttar NS, Lutzke LS, Wu TT, Wang KK. World J Gastroenterol. 2013 Dec 14;19(46):8652-8. doi: 10.3748/wjg.v19.i46.8652.

September 2013. Safety of endoscopic mucosal resection for Barrett's esophagus. Tomizawa Y, Iyer PG, Wong Kee Song LM, Buttar NS, Lutzke LS, Wang KK. Am J Gastroenterol. 2013 Sep;108(9):1440-7; quiz 1448. doi: 10.1038/ajg.2013.187. Epub 2013 Jul 16.

August 2013. Lymphangioma of the small bowel mesentery: a rare intra-abdominal tumor causing anemia. Tomizawa Y, Garner K, Sohnen A. Clin Gastroenterol Hepatol. 2013 Aug;11(8):e57. doi: 10.1016/j.cgh.2012.11.013. Epub 2012 Nov 28.

June 2013. Peritoneal tuberculosis in an immunocompetent, unknown risk patient. Tomizawa Y, Yecies EB, Craig FE, Sohnen A. Case Rep Gastrointest Med. 2013;2013:680763. doi: 10.1155/2013/680763. Epub 2013 Jun 26.

June 2013. Acute colonic pseudo-obstruction (Ogilvie's syndrome) mimicking pneumoperitoneum. Tomizawa Y. Intern Med. 2013;52(21):2477-8.

May 2013. Spontaneous pneumomediastinum originating from extensive subcutaneous emphysema. Tomizawa Y, Sohnen AE. Intern Med. 2013;52(19):2291. Epub 2012 Mar 1.

March 2013. Spruelike enteropathy associated with olmesartan: an unusual case of severe diarrhea. Dreifuss SE, Tomizawa Y, Farber NJ, Davison JM, Sohnen AE. Case Rep Gastrointest Med. 2013;2013:618071. doi: 10.1155/2013/618071. Epub 2013 Mar 13.

July 2012. Endoscopic therapy is effective for patients with chronic pancreatitis. Clarke B, Slivka A, Tomizawa Y, Sanders M, Papachristou GI, Whitcomb DC, Yadav D. Clin Gastroenterol Hepatol. 2012 Jul;10(7):795-802. doi: 10.1016/j.cgh.2011.12.040. Epub 2012 Jan 13.

May 2012. Epithelial mesenchymal transition and cancer stem cells in esophageal adenocarcinoma originating from Barrett's esophagus. Tomizawa Y, Wu TT, Wang KK. Oncol Lett. 2012 May;3(5):1059-1063. Epub 2012 Mar 5.

March 2012. Orbital metastasis as the initial presentation of invasive lobular carcinoma of breast. Tomizawa Y, Ocque R, Ohori NP. Intern Med. 2012;51(12):1635-8. Epub 2012 Jun 15.

Contact Info

Advanced Endoscopy Fellowship, Hospital of the University of Pennsylvania, Philadelphia, PA

Fellowship, Gastroenterology Chairman, University of Chicago Medical Center, Chicago, IL

Residency, Internal Medicine, University of Pittsburgh Medical Center, Presbyterian Shadyside, Pittsburgh, PA

Intern, Internal Medicine, University of Pittsburgh Medical Center, Presbyterian Shadyside, Pittsburgh, PA

Research Fellowship, Gastroenterology, Mayo Clinic, Rochester, MN

Transitional Internship, US Naval Hospital, Kanagawa, Japan

Fellowship, Gastroenterology, Mitsui Memorial Hospital, University of Tokyo, Tokyo, Japan​

Residency, Internal Medicine, Mitsui Memorial Hospital, University of Tokyo, Tokyo, Japan

MS, Public Health Sciences, University of Chicago, Chicago, IL

MD, Tokyo Medical University, Tokyo, Japan

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