A Rare Case Presentation: Multiple Myeloma with Extramedullary Plasmacytoma Mimicking Lung Tumor

Multiple myeloma (MM) is a hematological malignancy characterized by clonal proliferation of plasma cells in the bone marrow. Mostly, clonal proliferation of plasma cells is limited to the bone marrow, the occurrence of the extramedullary disease is very uncommon in MM. And approximately 80–90% of extramedullary lesions occur in the head and neck. Only in rare cases, the malignant plasma cells of multiple myeloma had infiltrated the lung parenchyma. Hereby, we present a case of a-53 year-old-mandiagnosed with an extramedullary disease of multiple myeloma (EMD). The patient complained of fatigue, nausea vomiting, and bone pain. Chest radiograph discovered opacity in the left lung, transthoracic biopsy showed an extramedullary plasmacytoma, and bone survey discovered multiple lytic lesions.