General
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• Very rare; breast glandular tissue but no nipple or areola
• Also a genus of fungi
• References: Wikipedia

Terminology
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• See also amastia / aplasia / hypoplasia

Epidemiology
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• Associated with Poland syndrome (musculoskeletal deformities of chest wall and ipsilateral upper extremity, eMedicine, OMIM #173800)
• Part of scalp-ears-nipple (Finlay-Marks) syndrome (Br J Dermatol 1978;99:423)
• Associated with carbimazole use for thyrotoxicosis during pregnancy (Am J Med Genet 1998;75:220)

Case reports
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• Newborn girl with choanal atresia, renal tubulopathy and family history of neck cysts, who died shortly after birth (Am J Med Genet A 2007;143A:1231)
• 3 year old girl with bilateral athelia, congenital jejunal atresia and choanal atresia (Clin Dysmorphol 2006;15:37)
• Associated with focal dermal hypoplasia (Clin Genet 2008;73:373)

Clinical images
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Obvious breast asymmetry with a rudimentary left sided nipple

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