A Case of Multiple Myeloma with Extremely Rare Manifestation

Abstract

Introduction: Multiple myeloma (MM) is a neoplastic proliferation of immunoglobulin-producing plasma cells that have multiple presentations due to the infiltration of plasma cells in the bone marrow and other organs. Common manifestations include anemia, bone pain, fatigue, and hypercalcemia. MM presented with rectorrhagia is very rare. Case Presentation: A 74-year-old woman with a history of rectorrhagia episodes from about nine months ago presented with severe anemia, weakness, and lethargy. The findings of endoscopy and colonoscopy did not justify the patient's manifestation, and finally, due to thrombocytopenia and anemia, a bone marrow biopsy was performed, and multiple myeloma was diagnosed. Conclusions: Although GI bleeding in Multiple myeloma is a very rare manifestation, this diagnosis must be considered in the differential diagnosis of patients with unexplained and refractory GI bleeding.