A Case report of a rare large keratinous Cyst of the Breast

Background: Epidermal cyst of the breast is a rare condition; however a common finding in other parts of the body and most commonly located in the scalp, back, and neck. Only a few cases of epidermal cysts of the breast have been reported in literature. Case Report: The 56 years old female patient presented with a large lump in right breast. FNAC was suggestive of keratinous cyst. Excision biopsy was done and Histology showed an epidermal/ keratinous cyst. To the best of our knowledge this is the largest epidermoid cyst in a female ever reported in Indian literature. Conclusion: Epidermal inclusion cyst of the breast is an uncommon benign lesion. Diagnosis can be made with ultrasonography, mammography, and biopsy. When found excisional biopsy should be done to avoid complication like infection or malignant transformation. Patient consent is obtained.