Seven nipples in a male: World's second case report.

We present a case of seven nipples in a 32-year-old male patient. The patient had two regular nipples along with five supernumerary nipples. Usually, supernumerary nipples develop along the two vertical "milk lines" which start in the arm pit on each side, run down through the typical nipples, and end at the groin. Our patient had six nipples which confirm to the "milk lines" and one nipple which was above the umbilicus in the midline and did not confirm to the "milk lines." To our knowledge, this is the second case report with seven nipples in the world.

Two Cases of Supernummerary Breast / 대한피부과학회지

Supernummerary breast is a rare developmental anomaly occurring along the course of the embryological milk lines, which run from the anterior axillary folds to the inner thighs. Kajava first described the classification of supernumerary tissue in 1915, and this term is still in use. We herein report two cases of supernumerary breast, classified as Kajava classification type 3 and 6.