Extra (supernumerary or accessory) nipples or breast tissue

Extra nipples or breast tissue is fairly common (1-6% of women) and is a result of incomplete regression of the mammary ridge (milk line) during the development of the embryo before birth.

Supernumerary (Extra) Nipple Removal

Frontiers Ectopic Breast Tissue in the Inguinal Region: A Case Report and Suggestion of Indications for Excision

Breast pain

Supernumerary Nipple: Causes, Diagnosis, and Images — DermNet

Supernumerary nipple and seminoma: Case report and review of polythelia and genitourinary cancers

Có nên thực hiện cắt tuyến vú phụ - Những điều cần biết

Third Nipple: Incidence, Types, Causes, and Removal

Có nên thực hiện cắt tuyến vú phụ - Những điều cần biết

Supernumerary Nipple: Causes, Diagnosis, and Treatment

Figure 1 from Case report: ectopic nipple on the sole of the foot, an unexplained anomaly.

Accessory Breast Tissue in Pregnancy

Why do people have extra nipples?

Supernumerary Nipples & Breasts - Goldberg Plastic Surgery

Supernumerary nipple - Wikipedia

Developmental Abnormalities