Squamous metaplasia of the verumontanum with obstruction due to hypertrophy: long-term effects of estrogen on the prostate in an aging male-to-female transsexual.

We report on a 30-year-old male-to-female transsexual who had been treated with diethylstilbestrol and Premarin from 1954 to the present. A sex change operation was done. In May 1979 transurethral resection was performed for obstruction due to the enlargement of the verumontanum. Transurethral resection was repeated in January 1983 for obstructive symptoms. The interesting effect of the estrogens on the verumontanum and prostate is described and illustrated. The squamous metaplasia is compared to that seen in the prostate of a true hermaphrodite.