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

Topic Completed: 1 July 2010

Minor changes: 9 August 2019

Copyright: 2002-2019,, Inc.

PubMed Search: Breast amastia aplasia hypoplasia

Hind Warzecha, M.D.
Page views in 2019: 636
Page views in 2020 to date: 227
Cite this page: Warzecha H. Amastia / aplasia / hypoplasia of breast tissue. website. Accessed May 28th, 2020.
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

Back to top