Aggressive lactating adenoma mimicking breast carcinoma: A case report.

Abstract Introduction Lactating adenoma is a rare breast tumor which is commonly found in late pregnancy or lactation period. Despite its benign nature, lactating adenoma might develop aggressively and can be misdiagnosed as breast cancer. Case presentation We report a case of a 25-year-old female presenting with two large, ulcerative and bleeding breast masses. An open biopsy demonstrating lactating adenoma was considered discordant and surgery was performed to confirm the diagnosis. Conclusion Careful clinical and histological evaluations are necessary to diagnose and manage lactating adenoma.