Colorectal Surgery
MD, PhD, Head, Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwa Chiba, Japan
Dr. Masaaki Ito is the head of the Department of Colorectal Surgery, Division of Surgical Technology as well as the head of the Medical Device Project Management Office at the Next Medical Device Innovation Center of the National Cancer Center Hospital East in Chiba, Japan. He received his MD from the Graduate School of Medicine, Chiba University in 1993 and his PhD from Chiba University in 2001. He is widely recognized as one of the foremost surgeons who is highly skilled in intersphincteric resection for rectal cancer. He is currently also engaged in the development of innovative surgical instruments and operative procedures with notable surgeons and engineering technologists all over the world.
Selected publications from PubMed
Prognostic Impact of Circumferential Resection Margin in Minimally Invasive Surgery for Locally Advanced Rectal Cancer: A Multicenter Prospective Study.
Hamabe A, Ito M, Toda S, Suwa Y, Hasegawa S, Kotake M, Inomata M, Ueda K, Ogura A, Sugimoto K, Kimura K, Otsuka K, Noguchi T, Hida K, Hirano Y, Kawai K, Yamagishi S, Naitoh T, Takemasa I, Japan Society of Laparoscopic Colorectal Surgery
Ann Gastroenterol Surg. 2026 Aug 27 doi: 10.1002/ags3.70268.
Clinical utility and cost-effectiveness of universal tumor screening to identify Lynch syndrome in patients with stage II/III colorectal cancer: a prospective observational study in Japan.
Yoshioka T, Yamamoto Y, Tsukada Y, Igarashi A, Kuwata T, Kojima M, Hiraoka Y, Ikeda K, Nishizawa Y, Bando H, Akagi K, Yoshino T, Ito M
Int J Clin Oncol. 2026 Oct;31(10):2449-2459 doi: 10.1007/s10147-026-03153-5.
ASO Visual Abstract: Tele-Expert Consultation for Locally Recurrent Rectal Cancer: A Prospective Multicenter Evaluation of the CONNECT-LR System.
Tsukada Y, Ikeda M, Uehara K, Sekimoto M, Fujita F, Suto T, Ito M
Ann Surg Oncol. 2026 Oct;33(10):9232-9233 doi: 10.1245/s10434-026-20243-w.
Three-Year Follow-up of the Randomized Trial Comparing Open Versus Laparoscopic Surgery for Primary Tumor Resection in Patients With Noncurable Stage IV Colon Cancer (JCOG1107).
Shiomi A, Akagi T, Kajikawa R, Katayama H, Mizusawa J, Hasegawa T, Ito M, Watanabe J, Yamaguchi T, Okajima M, Ikeda S, Tsukamoto S, Takashima A, Kanemitsu Y, Inomata M
Dis Colon Rectum. 2026 Oct 1;69(10):2473-2483 doi: 10.1097/DCR.0000000000004373.
Tele-Expert Consultation for Locally Recurrent Rectal Cancer: A Prospective Multicenter Evaluation of the CONNECT-LR System.
Tsukada Y, Ikeda M, Uehara K, Sekimoto M, Fujita F, Suto T, Ito M
Ann Surg Oncol. 2026 Oct;33(10):9209-9218 doi: 10.1245/s10434-026-20088-3.
There are several anastomosis methods, and there is a debate on which one to select for low rectal cancer near the anal canal. In this session, Dr. Masaaki Ito discusses the selection of the anastomosis method based on the case. Firstly, Dr. Ito gives some management tips with a clear strategy for successful selection. The way to proceed will also differ depending on gender due to different anatomical characteristics. When it comes to complications, the most disastrous complications are ischemic ones, which can be of two types. Different scenarios that surgeons can find during the surgery are described.
Published
May 2022
Masaaki Ito reviews anastomosis methods for low rectal cancer near the anal canal: double stapling, hand-sewn coloanal and single stapling techniques.
With Japan Society For Endoscopic Surgery
Published
Mar 2022
Dr. Roel Hompes, Dr. Masaaki Ito, Dr. Antonio M. Lacy, Dr. Yves Panis, Dr. Nicolas Rotholtz and Dr. Patricia Sylla present the "Should We Change the Strategy in Patients with Compromised Tissue in Colorectal Surgery?" event.
With Johnson & Johnson MedTech
Published
Sep 2020
Help your network discover Dr. Masaaki Ito's clinical expertise.
