Metachronous infiltration of bone marrow due to breast cancer and multiple myeloma

Abstract

Multiple primary tumors are rarely seen in clinical practice. Cases of metastatic breast cancer associated withmultiple myeloma were rare in the literature. It is believed that simultaneously observed bone marrowinvolvement due to breast cancer and multiple myeloma is sporadic. We present a 49-year-old female patientwith metastatic breast cancer who developed multiple myeloma during breast cancer treatment