title: [A case of swelling of the right breast lasting from birth was observed in a two-year-old boy].
abstract: A secretion was collected from the nipple and was examined. Hirsutism and abnormal pigmentation were lacking, and the aspect of the external genitalia was normal. The cromatin sex was male. The sella turcica had a normal roentgenologic aspect. The urinary 17-ketosteroid and oestrogen excretion was normal. The swelling was removed surgically. A histologic diagnosis of gynaecomasty was made. The differential diagnosis, classification and physiopathology of gynaecomasty are discussed.
authors.affiliation: Ospedale Mauriziano Umberto I di Torino, Divisione Pediatrica.
authors.forename: G
authors.initials: G
authors.lastname: Pilotti
mesh_terms: D001940:Breast / Q000473:pathology*; D001941:Breast Diseases / Q000175:diagnosis*; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D006984:Hypertrophy; D007231:Infant, Newborn; D008297:Male