The differential diagnosis of cystic lesions of the prostate includes miillerian duct cysts, utricle cysts, cysts of the seminal vesicles or ejaculatory ducts, prostatic retention cysts, and prostatic abscesses. These are usually discovered incidently during transrectal ultrasound examination of the prostate, but are occasionally detected during the investigation of lower urinary tract symptoms or infertility. We report a case of ejaculatory duct obstruction secondary to a midline cyst of the prostate, and describe the intraoperative use of transrectal ultrasonography in guiding transurethral resection.
CASE REPORTA 39-year-old man with a complaint of decreased ejaculate volume was referred to our institution after transurethral resection failed to relieve what was thought to be an ejaculatory duct obstruction. The patient recalled that, since his early 20s, he had had a substantial decrease in his ejaculate volume. He initially did not seek medical attention. Several years later, after a single episode of hemospermia, he sought medical advice; however, no specific investigations or treatments were performed. He presented at this time for definitive evaluation.An initial semen evaluation revealed an ejaculate volume of 0.1 mL, which was negative for sperm and fructose. Serum follicle stimulating hormone (FSH) was 9 mIU/mL (normal 2 mIU/mL to 15 mIU/ml). A testicular biopsy, performed at the same time as the transurethral re-