Amazia
Amazia refers to a condition where one or both of the mammary glands is absent. This may occur either congenitally or iatrogenically. Amazia can be treated with breast implants.
Amazia differs from amastia, although the two conditions are often thought to be identical. The terms "amazia" and "amastia" are thus often used interchangeably, even though the two conditions are medically different.