Abstract

Diabetic mastopathy is a rare inflammatory breast disease demonstrated with ductitis, lymphocytic lobulitis and perivasculitis with stromal fibrosis. This lesion often presents as a discretely palpable uni- or bilateral mass in traditional type I diabetes and other autoimmune diseases. We report a case of diabetic mastopathy, which presented clinically as an indeterminate breast lump suspicious for malignancy. The patient is a 74-year-old woman who had type 2 diabetes mellitus. Mammography and ultrasonography raised a suspicion of malignancy, and a wire-guided excisional biopsy was performed. The biopsy was reported as invasive carcinoma. Histopathological examination now showed dense keloid-like stromal fibrosis with lymphoid features consistent with diabetic mastopathy.