18F-FDG PET/CT in a Case of Urothelial Carcinoma in the Urachus Presenting as Colon Cancer

Jeannette D. Andersen*, Knud Fabrin, Astrid Petersen, Helle D. Zacho

*Corresponding author for this work

Research output: Contribution to journalJournal articleCommunication

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Abstract

Urachal cancer arises from an embryologic remnant of the urogenital sinus and allantois and accounts for approximately 1% of bladder malignancies. The most encountered histologic subtype is adenocarcinoma. We present a 76-year-old man suspected to have an advanced sigmoid cancer infiltrating nearby organs. A supplemental 18F-FDG PET/CT showed high tracer uptake in a tumorous process coherent with the dome of the bladder wall involving the sigmoid colon. Cystoscopy revealed a normal bladder wall, except for a small edematous area in the anterior bladder. Biopsies from the sigmoid colon and transurethral resection from the bladder confirmed a urothelial carcinoma originating from the urachus.

Original languageEnglish
Article number31
JournalDiagnostics
Volume12
Issue number1
ISSN2075-4418
DOIs
Publication statusPublished - 2022

Keywords

  • 18F-FDG PET/CT
  • Urachal cancer
  • Urothelial carcinoma

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