Cytological Diagnosis of Epidermal Inclusion Cyst of Breast: A Rare Case Series of Four Cases with Review of Literature

An epidermal inclusion cyst (EIC) arising from the breast is a rare, benign condition that may potentially be malignant. EICs of the breast often presents in the fifth decades of life and is primarily localized in the periareolar region. We report four cases of EIC of the breast, three women in their forties and one in twenties. The diagnostic accuracy needs correlation between sonographic, mammographic findings along with cytohistological features. Fine-needle aspiration cytology is essential for accurate preoperative diagnosis. Excision is usually recommended to confirm and avoid potential risks of infection and malignant transformation. Till now, less than 100 cases have been reported in English literature. The present study highlights not only its rare site of presentation, but also the role of FNAC in diagnosing this benign lesion.