Coexisting lactating adenoma and invasive breast carcinoma: A case report and review of literature

Abstract

Lactating adenomas are the most common masses occurring during pregnancy. Although they are not thought to carry an increased risk of malignancy, there are rare cases of co-existence of Lactating adenoma and Invasive breast carcinoma. We present a 24-year-old lactating woman with an enlarging breast lump for 1 year. Histopathological examination of the resected mass showed lactating adenoma and invasive ductal carcinoma, no special type. This may have been a collision between a separate lactating adenoma and an invasive ductal carcinoma or a malignant transformation of a lactating adenoma. Analysing this case and more such cases can enable us to better understand the etiological factors, clinical and histological characteristics, and the prognosis of invasive ductal carcinoma associated with lactating adenoma.