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We report a case of ectopic prostate tissue with an associated prostatic adenocarcinoma occurring in the dome of the urinary bladder. A 62-year-old man presented with a 4-month history of persistent microscopic hematuria following a urinary tract infection. Other complaints included frequent urination, but there was neither dysuria nor gross hematuria. Digital rectal examination revealed a smooth prostate of normal size. Cystoscopic examination revealed a sessile lesion of the anterior bladder neck and multiple smaller papillary lesions throughout the bladder. Following a transurethral resection of the bladder tumor with a diagnosis of muscle-invasive transitional cell carcinoma grade 3, a radical cystoprostatectomy was performed. The diagnosis of transitional cell carcinoma was confirmed, but in addition, a different lesion was also incidentally found in the dome of the bladder. This incidental lesion showed a prostatic adenocarcinoma arising from ectopic prostatic tissue within the bladder submucosa. The prostate also showed prostatic adenocarcinoma, but this was minimal, low grade, and confined to the prostate gland, and thus it was felt to be unlikely to have metastasized to the bladder dome. Adenocarcinoma arising in ectopic prostatic tissue is a rare finding and to our knowledge only 1 case has been previously described, occurring in the soft tissue adjacent to the prostate. We report the first case of adenocarcinoma arising in ectopic prostatic tissue within the bladder.

archives of pathology and laboratory medicine

Adenocarcinoma in Ectopic Prostatic Tissue at Dome of Bladder: A Case Report of a Patient With Urothelial Carcinoma of the Bladder and Adenocarcinoma of the Prostate