Immunoglobulin D Multiple Myeloma, a More Aggressive Subtype

Immunoglobulin D (IgD) multiple Myeloma (MM) is a very rare subtype of myeloma. It accounts for only 1-2% of all MM patients. It is associated with a rapidly progressive disease and poorer outcomes compared with other MM subtypes. In this case report, we present a case of a sixty-year-old man who presented to our hospital with fatigue, anemia, thrombocytopenia, and acute renal failure. His bone marrow biopsy during admission showed 75.9% of plasma cells with significant light chain burden. He was also found to have severe immunoglobulin deficiency along with a lambda to kappa ratio was <0.01. The diagnosis of IgD MM was established, and he was started on CyBorD (Bortezomib, cyclophosphamide, and dexamethasone). Our patient also required hemodialysis for his kidney failure.