Breast - nonmalignant
Congenital anomalies
Amastia / aplasia / hypoplasia of breast tissue

Topic Completed: 1 July 2010

Revised: 10 January 2019

Copyright: (c) 2002-2019,, Inc.

PubMed Search: Breast amastia aplasia hypoplasia

Hind Nassar, M.D.
Page views in 2018: 678
Page views in 2019 to date: 268
Cite this page: Nassar H Amastia / aplasia / hypoplasia of breast tissue. website. Accessed June 17th, 2019.
Definition / general
  • Amastia: no glandular tissue (no breast bud), no nipple and no areola
  • Aplasia: nipple and areola present but no glandular tissue
  • 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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