Congenital anomalies

Amastia / aplasia / hypoplasia / athelia

Last author update: 1 July 2010
Last staff update: 21 June 2020

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PubMed Search: Breast amastia aplasia hypoplasia

Hind Warzecha, M.D.
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Cite this page: Warzecha H. Amastia / aplasia / hypoplasia / athelia. website. Accessed September 30th, 2023.
Definition / general
  • Amastia: no glandular tissue (no breast bud), no nipple and no areola
  • Aplasia: nipple and areola present but no glandular tissue
  • Athelia: very rare; breast glandular tissue but no nipple or areola (Wikipedia: Athelia (Disease)); also a genus of fungi
  • Hypoplasia: small rudimentary breasts (i.e. breast underdevelopment); also called micromastia
  • Uncommon
  • Occurs more often in females than males
  • Unilateral or bilateral
Case reports
Clinical images

Images hosted on other servers:

Amastia in 11 year old girl

Hypoplasia in 9 year old girl
(fig 1)

Becker nevus with hypoplasia

Hypoplasia of right breast

26 year old woman:

Preoperative of bilateral amastia

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Image 01 Image 02