16th Sep 2014
Dr Ian McColl all articles by this author
Accessory nipples rarely cause a problem.
THEY can range from a flat discolouration through to a fully developed nipple with underlying areola and breast tissue, and occur in both males and females in about 1–2% of the population.
They originate from bilateral milk lines which in embryogenesis stretch from the axillae through the breasts to the groin and can be seen anywhere along these lines. They become more prominent in pregnancy.
They have been mistaken for melanoma and been excised. A rare case of a ductal adenocarcinoma has been reported in an accessory nipple and spreading to axillary glands. However, routine excision of accessory nipples is not recommended.
There is a rare association of genital malignancies such as seminoma of the testis. Sometimes there is a family history inherited as an autosomal dominant disorder.
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