Iruru Maetani

Education & Professional Activities

Education
1982-1990 Toho University School of Medicine, Awarded the doctor’s degree in medicine
1976-1982 Toho University School of Medicine, Awarded the degree of BSc.

Career
2006-present
Professor and Chairman, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Toho University Ohashi Medical Center
1997-2006
Assistant professor, Dept. of Internal Medicine, Toho University Ohashi Hospital
1997
Chief of 3rd dept. of Internal Medicine, Toho University Ohashi Hospital
1990-1997
Instructor of 3rd dept. of Internal Medicine, Toho University Ohashi Hospital
1984-1990
Clinical Fellow of 3rd dept. of Internal Medicine, Toho University Ohashi Hospital
1982-1984
Resident of Toho University Ohashi Hospital
Research experience:
1984-present
Research Associate at Division of Gastroenterology, Dept. of Internal Medicine, Toho University Ohashi Medical Center

Awards
2005 The Best Poster of the Session Prize. 6th International Gastric Cancer Congress
2013 Distinguished Paper Award of Japan Gastroenterological Endoscopy Society of 2013

Affiliated Organizations
Professional memberships:
Japanese Society of Internal Medicine (JSIM)––Councilor, Fellow
Japanese Society of Gastroenterology (JSGE)—Councilor, Fellow
Japan Gastroenterological Endoscopy Society (JGES)—Councilor, Fellow
Japan Biliary Association (JBA)—Councilor
Japanese Society for Abdominal Emergency Medicine (JSAEM)—Executive board member, Councilor
Japan Society of Coloproctology—Fellow
American Society for Gastrointestinal Endoscopy (ASGE)—international member

Editorial board member
World Journal of Gastrointestinal Surgery
World Journal of Gastrointestinal Endoscopy
Journal of Gastroenterology and Hepatology Research
Journal of Gastrointestinal & Digestive System

Review board member
Gastrointestinal Endoscopy
Endoscopy
Digestive Diseases and Sciences
Journal of Gastroenterology and Hepatology
Journal of Hepato-Biliary-Pancreatic Sciences
Digestive Endoscopy
Journal of Gastroenterology
European Journal of Gastroenterology and Hepatology



Research & Publications
Publications
1. Nishikawa K, Ogawa S, Sato M, Hoshi H, Ohashi S, Yoshioka H, Maetani I, Sakai Y. A study of malignant bile duct stenosis using percutaneous transhepatic cholangioscopy. Digest Endosc 1991;3:342-9.
2. Maetani I, Hoshi H, Ohashi S, Yoshioka H, Sakai Y. Cholangioscopic extraction of intrahepatic stones associated with biliary strictures using a rendezvous technique. Endoscopy 1993;25:303-6.
3. Maetani I, Ogawa S, Hoshi H, Sato M, Yoshioka H, Igarashi Y, Sakai Y. Self-expanding metal stents for palliative treatment of malignant biliary and duodenal stenosis. Endoscopy 1994;26:701-4.
4. Sato M, Maetani I, Ohashi S, Ogawa S, Anzai T, Hoshi H, Yoshioka H, Igarashi Y, Sakai Y. Relationship between percutaneous transhepatic cholangioscopy findings and pattern of carcinomatous spread in the bile duct. Diagn Ther Endosc 1994;1:45-50.
5. Maetani I, Ogawa S, Sato M, Igarashi Y, Sakai Y, Shibuya K. Lack of methylene blue staining in superficial epithelia as a possible marker for superficial lateral spread of bile duct cancer. Diagn Ther Endosc 1996;3:29-34.
6. Maetani I, Inoue H, Sato M, Ohashi S, Igarashi Y, Sakai Y. Peroral insertion technique of self-expanding metal stents for malignant gastric outlet and duodenal stenosis. Gastrointest Endosc 1996;44:468-471.
7. Sato M, Inoue H, Ogawa S, Ohashi S, Maetani I, Igarashi Y, Sakai Y. Differences in fine mucosal structure between superficial spreading carcinoma and non-neoplastic bile duct mucosa detected by percutaneous transhepatic cholangioscopy. Digest Endosc 1997;9:43-7
8. Sato M, Inoue H, Ogawa S, Maetani I, Igarashi Y, Sakai Y. Limitations of percutaneous transhepatic cholangioscopy for the diagnosis of the intramural extension of bile duct carcinoma. Endoscopy 1998;30:281-8.
9. Sato M, Ukita T, Ishiguro J, Ogawa S, Maetani I, Igarashi Y. Superficial epithelium in the biopsied sections taken from malignant bile duct stenosis. Digest Endosc 1998;10:195-8.
10. Maetani I, Ogawa S, Sato M, Igarashi Y, Sakai Y. Possible application of microwave coagulation therapy for recanalizing tumor-occluded self-expandable metallic stents. Digest Endosc 1999;11:158-64.
11. Maetani I, Inoue H, Ogawa S, Sato M, Igarashi Y, Sakai Y. Percutaneous microwave coagulation therapy using cholangioscopy for recanalizing self-expanding metallic stents occluded by tumor ingrowth: preliminary results. Digest Endosc 1999;11:209-14.
12. Igarashi Y, Ukita T, Inoue H, Ishiguro J, Ogawa S, Sato M, Maetani I, Sakai Y. Clinical evaluation of the peroral cholangioscopy using a new videoscope. Diagn Ther Endosc 1999;5:231-7.
13. Maetani I, Ishiguro J, Ogawa S, Sato M, Igarashi Y, Sakai Y. Percutaneous choledochoscopic treatment of intrahepatic stones, including management of associated biliary stenosis. Endoscopy 1999;31:456-9
14. Maetani I, Inoue H, Ogawa S, Sato M, Igarashi Y, Sakai Y. Percutaneous T-tube placement for bilateral internal drainage in malignant hilar obstruction. Hepato-gastroenterol 2000;47:1509-13.
15. Sato M, Ukita T, Inoue H, Ogawa S, Maetani I, Igarashi Y, Sakai Y. Optimum number of percutaneous transhepatic cholangioscopy-guided biopsies for histologic diagnosis for of bile duct carcinoma. Digest Endosc 2000;12:162-6.
16. Igarashi Y, Tada T, Shimura J, Ukita T, Inoue H, Ogawa S, Sato M, Maetani I, Sakai Y. Endoscopic stenting of distal malignant biliary obstruction. Digest Endosc 2000;12(Suppl.):S21-S3.
17. Maetani I, Ukita T, Inoue H, Igarashi Y, Sakai Y. Microwave recanalization: thermal effects with nitinol and stainless-steel stents. Endoscopy 2001;33:533-6.
18. Maetani I, Ukita T, Inoue H, Igarashi Y, Hoshi H, Sakai Y. Transpapillary microwave coagulation therapy for recanalizing self-expandable metallic stents occluded by tumor ingrowth: initial experience. Endoscopy 2001;33:719-23.
19. Tominaga K, Yoshida M, Maetani I, Sakai Y. Expandable metal stent placement in the treatment of a malignant anastomotic stricture of the transverse colon. Gastrointest Endosc 2001;53:524-7.
20. Kawase A, Kakemura T, Maetani I, Igarashi Y, Sakai Y. Placement of additional stent for recanalizing procedure of occluded jejunal stent. Gastrointest Endosc 2001;54:394-7.
21. Maetani I, Ukita T, Inoue H, Yoshida M, Igarashi Y, Sakai Y. Knitted nitinol stent insertion for various intestinal stenosis with a modified delivery system. Gastrointest Endosc 2001;54:364-7.
22. Maetani I, Ukita T, Inoue H, Igarashi Y, Hoshi H, Sakai Y. Microwave coagulation versus insertion of a second stent for occluded biliary metal stent. Hepato-gastroenterol 2001;48:1279-83.
23. Maetani I, Tada T, Shimura J, Ukita T, Inoue H, Igarashi Y, Hoshi H, Sakai Y. Technical modification and strategies for stenting gastric outlet strictures using esophageal endoprosthesis. Endoscopy 2002;34:402-6.
24. Maetani I, Shimura J, Ukita T, Inoue H, Igarashi Y, Sakai Y. Successful Repair of a damaged duodenal stent by cutting stent wires and placement of a second stent. Endoscopy 2002;34:86-8.
25. Igarashi Y, Tada T, Shimura J, Ukita T, Inoue H, Maetani I, Sakai Y. A New cannula with a flexible tip (swing tip) may improve the success rate of endoscopic retrograde cholangiopancreatography. Endoscopy 2002;34:628-31.
26. Igarashi Y, Ukita T, Inoue H, Maetani I, Sakai Y. Which modality can be standardized for endoscopic sphincterotomy in Japan. Digest Endosc 2002;14(Suppl.):10-2.
27. Maetani I, Tada T, Ukita T, Inoue H, Sakai Y, Yoshikawa M. PEG with introducer or pull method: a prospective randomized comparison. Gastrointest Endosc 2003;57:837-41.
28. Ukita T, Moriyama A, Tada T, Shimura J, Inoue H, Kakemura T, Maetani I, Igarashi Y, Sakai Y, Nakamura M. Successful management of postoperative pancreatic fistula by application of constructed S-type pancreatic stent after operation for abnormal biliary-pancreatic junction. Endoscopy 2003;35:253.
29. Igarashi Y, Tada T, Shimura J, Ukita T, Inoue H, Maetani I, Sakai Y. Endosonographic diagnosis of intraductal papillary-mucinous pancreatic tumors by intraductal ultrasonography. Digest Endosc 2003;15:196-9.
30. Maetani I, Tada T, Ukita T, Inoue H, Sakai Y, Nagao J. Comparison of duodenal stent placement with surgical gastrojejunostomy for palliation in patients with duodenal obstructions caused by pancreaticobiliary malignancies. Endoscopy 2004;36:73-8.
31. Maetani I, Ikeda M, Shimura J, Ukita T, Sakai Y. Current state of self-expandable metallic stent placement for gastric outlet obstruction. Digest Endosc 2004;16(Supple.):S9-S13.
32. Joo YE, Park CH, Lee WS, Kim HS, Choi SK, Cho CK, Rew JS, Kim SJ, Maetani I. Primary non-Hodgkin's lymphoma of the common bile duct presenting as obstructive jaundice. J Gastroenterol 2004;39:692-6.
33. Maetani I, Tada T, Ukita T, Yoshida M, Saida Y, Sakai Y. Self-expandable metallic stent placement as palliative treatment of obstructed colorectal carcinoma. J Gastroenterol 2004;39:334-8.
34. Laasch HU, Martin DF, Maetani I: Enteral stents in the gastric outlet and duodenum. Endoscopy 2005;37:74-81.
35. Maetani I, Yasuda M, Seike M, Ikeda M, Tada T, Ukita T, Sakai Y. Efficacy of an overtube for reducing the risk of peristomal infection after PEG placement. Gastrointest Endosc 2005;61:522-7.
36. Maetani I, Sakai Y: Reducing the risk of peristomal infection. Digest Endosc 2005;17:286-9.
37. Maetani I, Seike M, Ikeda M, Tada T, Ukita T, Sakai Y: Technical tips for stent placement of the proximal colon using knitted nitinol esophageal stent. Digest Endosc 2005;17:334-7.
38. Maetani I, Akatsuka S, Ikeda M, Tada T, Ukita T, Nakamura Y, Nagao J, Sakai Y. Self-expandable metallic stent placement for palliation in gastric outlet obstructions caused by gastric cancer: a comparison with surgical gastrojejunostomy. J Gastroenterol 2005;40:932-7.
39. Tada T, Ukita T, Maetani I, Sakai Y, Igarashi Y. Effect of extracorporeal shockwave lithotripsy and endoscopic treatment on symptoms and pancreatic function in pancreatolithiasis. Digest Endosc 2006;18:16-22.
40. Abe T, Maetani I, Kakemura T, Fujinuma S, Sakai Y. Successful placement of self-expandable metallic stents for double colorectal stents. Digest Endosc 2006;18:298-302.
41. Maetani I, Isayama H, Mizumoto Y. Palliation in patients with malignant gastric outlet obstruction with a newly designed enteral stent: a multicenter study. Gastrointest Endosc 2007;66:355-60.
42. Tominaga K, Saigusa Y, Ito S, Hirahata K, Nemoto Y, Maetani I. Percutaneous endoscopic gastrostomy with the aid of a colonoscope to avoid gastrocolic fistula formation. Endoscopy. 2007;39 Suppl 1:E112-3.
43. Sekine M, Maetani I, Sakai Y. Treatment of malignant ascites in patients with advanced cancer: peritoneovenous shunt versus paracentesis. J Gastroenterol Hepatol. 2007:22:2161-6
44. Tominaga K, Hirahata K, Maetani I, Kowazaki H, Tamura K, Matsubayashi J. A puzzling cause of melaena. Gut 2008;57:474, 482.
45. Tominaga K, Shigiyama F, Ito S, Iida T, Fujinuma S, Maetani I. Emergence of "cat scratch colon" during a colonoscopy. Endoscopy 2008;40:353; author reply 353.
46. Maetani I, Ukita T, Tada T, Ikeda M, Seike M, Terada H, Kohda E. Gastric emptying in patients with palliative stenting for malignant gastric outlet obstruction. Hepato-gastroenterol 2008;55:298-302.
47. Tominaga K, Iida T, Nakamura Y, Nagao J, Yokouchi Y, Maetani I. Small intestinal perforation of endoscopically unrecognized lesions during peroral single-balloon enteroscopy. Endoscopy. 2008;40 Suppl 2:E213-4.
48. Abe T, Kakemura T, Fujinuma S, Maetani I. Successful outcomes of EMR-L-with 3D-EUS for rectal carcinoids compared with historical control. World J Gastroentero 2008;25:4054-8.
49. Maetani I. Unresolved questions of chromocholangioscopy with methylene blue. Endoscopy 2008;40:786.
50. Hiki N, Maetani I, Suzuki Y, Washizawa N, Fukuda T, Yamaguchi T. Reduced risk of peristomal infection of direct percutaneous endoscopic gastrostomy in cancer patients: comparison with the pull percutaneous endoscopic gastrostomy procedure. J Am Coll Surg 2008:207:737-44