Ectopic Prostate Tissue at the Bladder Dome Presenting as a Bladder Tumor
A 72-year-old man presented to our urology department with a history of gross painless hematuria and dysuria. Initial laboratory signs were within normal levels, except hematuria in routine urine analysis. Abdominal computed tomography revealed a sessile bladder mass (dimensions, 1.0 cm×1.5 cm) at the bladder dome, but no perivesical infiltration or regional lymphadenopathy was observed. Cystoscopy results also showed a smooth sessile mass (dimensions, 1.0 cm×1.5 cm) at the bladder dome (). The patient underwent transurethral resection for treatment of the bladder mass. Histological analysis of the tissue submitted showed several fragments of bladder mucosa and subepithelial tissue. Microscopic examination showed several benign prostate glands with 2 distinct cell layers (the basal cell and luminal epithelial cell layers) embedded in the subepithelial stroma (). Some of the glands were cystically dilated (), and some contained corpora amylacea. There was no direct continuation with the bladder mucosa, and although some of the bladder mucosa was denuded, no severe inflammation was evident in the surrounding tissue. Immunohistochemical analysis results showed that most prostatic glands were strongly positive for prostate-specific antigen (PSA). The postoperative course was uneventful. The postoperative 6-month follow-up indicated that the patient was well and had not experienced a recurrence.