Axillary Accessory Breast Tissue Mimicking Lipoma

Accessory?breast?tissue is rare congenital condition?which occurs in 0.4-6% of women, it is usually bilateral, asymptomatic and commonly present in axilla. Diagnosis is difficult when it is unilateral with absence of areola and nipple, it can be made by ultrasonography. Surgical excision is warranted in case of functional symptoms or aesthetic discomfort. Herein, we report a case of right-sided accessory?breast?in a 36-year-old woman manifested in axillary swelling, clinically argued for a possible lipoma. Diagnosis was confirmed by ultrasonography and histological examination followed by surgical excision which relieved functional symptoms with significant cosmetic improvement.