Urachal papillary cystadenocarcinoma: a rare case report.

Urachal papillary mucinous cystadenocarcinoma is a rare tumor and represents 0.17-0.34% of all bladder tumors. It has an insidious course and variable clinical presentation. We present a case report of a 37-year-old female who presented with a lump in the abdomen. MRI revealed a solidcystic mass in the right lumbar region. Fine needle aspiration cytology was suggestive of adenocarcinoma. Histopathological examination of the excised mass revealed papillary adenocarcinoma that brought out the presence of focal PAS-positive intracytoplasmic mucin in the tumor cells. Clinicians should have a high degree of suspicion for these rare tumors.