A nationwide, multi-institutional collaborative retrospective study of colorectal neuroendocrine tumors in Japan.

Aim: Neuroendocrine tumors (NETs) are one of the subtypes of neuroendocrine neoplasms and are defined as epithelial neoplasms with predominant neuroendocrine differentiation. The aim of this study was to clarify the clinicopathological characteristics of colorectal NETs through a nationwide retrospective study in Japan.

Methods: This multicenter retrospective cohort study of NETs in Japan was conducted by the study group of the Japanese Society for Cancer of the Colon and Rectum.

Longterm Outcome of Liver Transplantation for Congenital Extrahepatic Portosystemic Shunt.

Liver transplantation (LT) is often viewed as the last resort for the treatment of congenital extrahepatic portosystemic shunt (CEPS) due to advancement of imaging and interventional radiology techniques. However, some patients still require LT, and criteria for LT are yet to be determined. We conducted a national survey of patients undergoing LT for CEPS between June 1998 and August 2018 and evaluated the clinical data and outcomes with a review of previously reported patients from the English-language medical literature.

Local control of sphincter-preserving procedures and abdominoperineal resection for locally advanced low rectal cancer: Propensity score matched analysis.

Sphincter-preserving procedures (SPPs) for surgical treatment of low-lying rectal tumors have advanced considerably. However, their oncological safety for locally advanced low rectal cancer compared with abdominoperineal resection (APR) is contentious. We retrospectively analyzed cohort data of 1500 consecutive patients who underwent elective resection for stage II-III rectal cancer between 2010 and 2011.