TY - JOUR T1 - Linitis plastica of the rectum secondary to prostate carcinoma JF - BMJ Case Reports JO - BMJ Case Reports DO - 10.1136/bcr-2021-248462 VL - 15 IS - 12 SP - e248462 AU - Michiel C Mommersteeg AU - Dennis A Kies AU - Jaap van der Laan AU - Janneke Wonders Y1 - 2022/12/01 UR - http://casereports.bmj.com/content/15/12/e248462.abstract N2 - Linitis plastica is an intramural carcinoma that may occur in any hollow organ. Rectal linitis plastica (RLP) is a morphological variant cancer that may occur as a primary form of cancer or secondary as a metastasis of a primary malignancy. We report the case of a man in his 70s with RLP secondary to prostate carcinoma who was initially suspected to have an obstructing rectal adenocarcinoma. During colonoscopy a segment of cobblestone mucosa was seen in the distal rectum. Subsequent imaging showed enhancement of all wall-layers of the rectum and diffuse retroperitoneal fat infiltration with traction on both ureters. A prostate-specific membrane antigen scan confirmed RLP secondary to a prostate carcinoma mimicking the clinical and radiological signs of an obstructing rectal carcinoma with retroperitoneal fibrosis.This case emphasises the possible pitfalls in the diagnosis of RLP and the importance of advanced imaging techniques, such as MRI, as well as appropriate histological samples. The patient underwent androgen deprivation therapy to which RLP responded well and neither systemic chemotherapy or surgery was necessary. ER -