Congenital Amastia is the absence of the entire breast — including the breast tissue, nipple and areola.
Amastia is a rare, congenital (present at birth) condition in which a child’s breast tissue doesn’t develop. Amastia can affect one (unilateral) or both (bilateral) breasts. Children with bilateral amastia often have other birth defects.
The main sign of amastia is a flat chest with no breast tissue or nipples. Additional symptoms may develop if the child has a genetic condition, which will be specific to that disease.
Amastia can be caused by several genetic conditions that affect a child’s DNA and development, including: