Amastia refers to a condition where breast tissue, nipple, and areola is absent, either congenitally or iatrogenically. Amastia in girls can be treated with augmentation mammoplasty.

Amastia differs from amazia

Amazia

Amazia refers to a condition where one or both of the mammary glands is absent . This may occur either congenitally or iatrogenically...

 (which involves only the absence of breast tissue; the nipple and areola remain present), although the two conditions are often (erroneously) thought to be identical. The terms "amastia" and "amazia" are thus often used interchangeably, even though the two conditions are medically different.

See also

• Amazia
  Amazia
  Amazia refers to a condition where one or both of the mammary glands is absent . This may occur either congenitally or iatrogenically...
  
  
• Athelia
• Micromastia
  Micromastia
  Micromastia, or breast hypoplasia, is a medical term describing the postpubertal underdevelopment of a woman's breast tissue. Just as it is impossible to define 'normal' breast size, there is no objective definition of micromastia. Breast development is commonly asymmetric and one or both breasts...