Urachal mucinous adenocarcinoma with pseudomyxoma peritonei: A case report.

Rationale: Pseudomyxoma peritonei is an unusual clinical condition, and the appendix and ovaries are reported as the primary sites.

Patient Concerns: A 44-year-old man who was reported a 3-month history of lower abdominal pain and distention, along with increased abdominal girth, was admitted with a palpable tender mass in the central lower abdomen.

Diagnosis: Ultrasonography showed a large well-circumscribed cystic-solid mass with lobulated margin, extending from the anterosuperior dome of the urinary bladder to the anterior abdominal wall.