A Case of Diabetic Mastopathy

Diabetic mastopathy is an unusual fibroinflammatory breast lesion that is characteristically presented in premenopausal women with long-standing diabetes with multiple microvascular complications. This patient was a 49-year-old postmenopausal woman with diabetic nephropathy, neuropathy, and retinopathy. Although palpable mass was detected on the left breast, an ultrasonography could not distinguish it from breast cancer. Excisional biopsy was conducted. Histological findings indicated diabetic mastopathy with keloid-like fibrosis, perivascular lymphocytic infiltration, and lymphocytic lobulitis without evidence of malignancy. After excision, there has been no recurrence until now.