Primary Ectopic Breast Carcinoma in Man Mimicking Keloid

BACKGROUND: Ectopic breast tissues (EBT) are developmental abnormality found in 1-6% of normal population. Like an orthotopic breast tissue, ectopic breast may have similar pathological changes including malignancy. Breast cancer as well as ectopic breast tissue in male are extremely rare. We present a case of ectopic breast carcinoma (EBC) in middle aged man mimicking keloid. CASE REPORT: A forty-two-year-old Indo-Aryan male referred from primary health care to the dermatology clinic with firm multi-nodular, non-tender, fleshy sessile mass on his right axilla measuring two by three cm in diameter. Excision of this lesion revealed moderately differentiated ductal carcinoma consistent with ectopic breast carcinoma. CONCLUSION: We report this case to shed light on such a rare condition and to keep in mind that ectopic breast carcinoma should be in differential diagnosis of any suspicious mass in axillae.