[Complete supernumerary breast on the thigh in a male patient].

BACKGROUND: Supernumerary nipples are not rare but the developement of a complete supernumerary breast is exceptional. CASE REPORT: A 59-year-old man presented a progressively increasing ancient right- groin-masse. The histopathologic examination of the lesion confirmed the diagnostic of polymastia. DISCUSSION: The interest of this observation results from the very unusual occurence of polymastia (less than 1 p. 100 of supernumerary nipples), especially for a caucasian man. The prevalence appears to be higher in women and oriental people. Diagnostic of supernumerary nipple is difficult because of its atypical appearance and ectopic location. However, this diagnostic is important because ectopic breast tissue is subject to the same pathologic changes that occur in normally positioned breasts and it can be a marker for associated diseases such as urologic malformations or urogenital malignancies.