Background: A 67-year-old woman with a history of smoking presented with abdominal pain and hematuria. On physical examination, she had a palpable pelvic mass. Imaging revealed a large pelvic mass situated on the dome of the bladder, extending from the urachus, without evidence of other sites of metastases. After resection, urachal adenocarcinoma was histologically confirmed. No adjuvant therapy was administered. Repeat imaging obtained 3 months after resection revealed a large left pelvic mass consistent with recurrence.
Investigations: Physical examination, pelvic and complete lymph-node examination, laboratory tests, urine analysis, CT scan of the abdomen and pelvis, chest X-ray, bone scan, cystoscopy, histologic examination of tumor morphology, and MRI of the abdomen and pelvis.
Diagnosis: Metastatic urachal adenocarcinoma.
Management: Surgical excision combined with cystectomy and pelvic lympadenectomy, chemotherapy with 5-fluorouracil, leucovorin, and irinotecan.