Rare diseases · Sign or symptom
Supernumerary nipple
Accessory nipple
HP:0002558
What it means
Presence of more than two nipples.
Rare diseases that can present with this32
Very common80–99%
5Common30–79%
7- 19q13.11microdeletion syndrome
- 2q37microdeletion syndrome
- 3MC syndrome
- Craniofrontonasal dysplasia-Poland anomaly syndrome
- Deafness-genital anomalies-metacarpal and metatarsal synostosis syndrome
- Hidrotic ectodermal dysplasia, Halal type
- Microcephaly-seizures-intellectual disability-heart disease syndrome
Sometimes5–29%
17- 2p15p16.1microdeletion syndrome
- Cerebellar ataxia-hypogonadism syndrome
- Char syndrome
- Choroidal atrophy-alopecia syndrome
- Ectodermal dysplasia-intellectual disability-central nervous system malformation syndrome
- Filippi syndrome
- Hyperphosphatasia-intellectual disability syndrome
- Incontinentia pigmenti
and 9 more in this range
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: accessory mamilla · accessory mamillas · Accessory nipples · Increased nipple number · Supernumerary nipples
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.