Peritoneal pseudomyxoma associated with synchronic malignant mucinous neoplasias of the cecum, appendix and rectum. Case report and review of the literature

Peritoneal pseudomyxoma is a pathological condition that compromises the peritoneum, characterized by the production of large quantities of mucinous liquid, which progressively fills the peritoneal cavity, originating in general from mucinous appendicular or ovarian tumors. We report a peritoneal pseudomyxoma associated with mucinous adenocarcinoma of the appendix synchronic with adenocarcinoma of the rectum in a 44 year old patient, where the initial diagnosis was rectal adenocarcinoma. Tumour of the appendix and peritoneal pseudomyxoma were incidental and found intraoperatively. We focus the histological patterns of the lesions, diagnosis and the treatment, with revision of the literature.