Breast Cyst

**Definition:** A fluid-filled closed cavity or sac that is lined by an EPITHELIUM and found in the BREAST. It may appear as a single large cyst in one breast, multifocal, or bilateral in FIBROCYSTIC BREAST DISEASE.

**Tree numbers:** - C04.182.156 - C17.800.090.249

**Synonyms:** - Breast Cysts