A CASE OF PREPUBERTAL GYNECOMASTIA ACCOMPANIED BY BLOODY NIPPLE DISCHARGE

Abstract

A case of prepubertal gynecomastia accompanied by bloody discharge is reported here. An one-year-old male was taken to the hospital because of a right breast lump and bloody nipple discharge. There were no abnormalities in the history of delivery and lactation, patient's development, and the external genitalia. A subareolar blue penetrable tumor (1.7×1.4 cm) with soft elasticity, sufficient movability, clear rim, and flat surface was plapated. Serologic hormone test revealed normal levels for luteinizing hormone (LH), follicle stimulating hormone (FSH), prolactin, testosterone, estradiol, and progesterone. Since bloody nipple discharge continued, the tumor was excised. Histopathological examination revealed a dilated lactiferous duct and slightly edema-like interstitial tissues around the lactiferous duct. Based on these findings, this case was diagnosed as gynecomastia. Prepubertal gynecomastia is a rare disease. Some reports have pointed out congenital malformation and neoplasm for its etiology. We diagnosed this case as idiopathic prepubertal gynecomastia, because any causative factors were not identified. There are few reports on the disease complicated by bloody nipple discharge, and this case is likely important in terms of histopathology.