Myeloid sarcoma in the breast in a patient withacute myeloid leukemia: a case report

Myeloid sarcoma infiltration into the breast of patients with acute myeloid leukemia is rare. The present study reports the case of a 56-year-old woman diagnosed with AML and an incidental finding of a breast tumor. The nodule biopsy raised the suspicion of invasive lobular carcinoma and poorly differentiated angiosarcoma. Subsequent immunohistochemical study concluded the diagnosis of myeloid sarcoma. The varied image presentations, the lack of knowledge of clinical data and complementary propaedeutics, and the histopathological similarity with certain primary breast lesions make it difficult to discover secondary infiltration by myeloid sarcoma in this unusual site.