Primary retroperitoneal mucinous cystadenocarcinoma in a male patient.

Primary retroperitoneal mucinous neoplasms are extremely rare tumors. Less than sixty cases have been reported in international literature until date, with striking female predominance. We report a case of primary mucinous cystadenocarcinoma of the retroperitoneum in a 51‑year‑old male presenting with nonspecific abdominal complaints. This case is being highlighted for its rare occurrence in a male patient.