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Start free with EleplanSupernumerary breasts
ORPHA:180182Morphological anomaly
Also called Polymastia · Accessory breasts
What it is
A rare breast malformation characterized by the presence of accessory breasts with a complete ductal system, areola, and nipple in addition to two normal breasts. The accessory breast tissue mostly lies along the milk lines. It is often not recognized until puberty, when it begins to respond to regular hormonal fluctuations, and may develop the same changes as normal breasts throughout life.
Key facts
- Classified as
- Morphological anomaly
ICD-10 codes
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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