Epidermal cyst in the breast: A common entity at an uncommon location.

The epidermal cysts are benign cysts most commonly found in the head and neck region and trunk. Epidermal cysts in breast are very rare with approximately 50 cases described in literature. It is important to diagnose these correctly as they may be misdiagnosed as benign or malignant mammary gland tumor both clinically and radiologically. We hereby report a rare case of epidermal cyst of breast clinically mistaken for a fibroadenoma in a 35 year old female, which was diagnosed on fine needle aspiration cytology as epidermal cyst and later confirmed on histopathology. This case is being reported to create awareness among clinicians as well as pathologists of this unusual entity and to reemphasize the importance of FNAC and core biopsy in diagnosis of breast lumps.