Four cases of IgD multiple myeloma

The pathological and clinical findings in 4 cases of IgD multiple myeloma are presented. Two patients presented with renal failure and 2 with bone pain and weight loss. Three had IgD lambda paraproteins and 1 an IgD kappa paraprotein. One patient also developed hypercalcemia and extraosseous spread of tumor to pleura, skin, and palate. There were no distinctive bone marrow or histological findings which suggested this unusual type of myeloma.