Multiple Myeloma with Primary Manifestation in the Mandible.

Multiple myeloma (MM) is a malignant neoplasm of plasma cell origin. It usually has a multicentric origin within the bone. It contributes to about 1% of all malignancies and 15% of all hematologic malignancies. There is a monoclonal proliferation of abnormal plasma cells in this disease that results from a single malignant precursor that has undergone an uncontrolled mitotic division. Later, these cells produce one type of immunoglobulin light chain, either kappa or lambda. We present a case of a 46­year­old male patient who presented with a swelling of the mandible. The punched-out radiolucencies in the skull radiograph and the immunohistochemistry confirmed the case as MM.