Giant retrovesical ectopic prostatic adenoma. Case report and revision of the literature.

We report a case of giant retrovesical adenoma originating from ectopic prostatic tissue. A 73-year-old man presented with progressive dysuria, increasing PSA values, and acute urinary retention. One year before presentation, the patient had undergone retropubic prostatic adenomectomy for benign prostate hyperplasia. At last admission, PSA value was 23 ng/ml; mpMRI demonstrated a dysomogeneus retrovesical mass of 8 cm in diameter. Biopsy histology demonstrated acute prostatitis of the residual parenchyma and a prostatic adenoma in the retrovesical mass. After antibiotics and restored spontaneous urination, the patient was discharged and refused surgical lesion removal. After three months, the patient remains asymptomatic.