Fibroadenoma-like foci in human prostatic nodular hyperplasia.

A morphologically distinctive lesion similar to fibroadenomas in female breast was found in 12 cases of benign prostatic hyperplasia out of 1356 prostatic specimens examined. All of them were from patients older than 60 years of age, and none from either normal or carcinomatous prostates. A possible pathogenetic interrelationship between the prostatic lesion and the fibroadenomas of female breast is discussed.