外科的摘出と化学療法を実施した皮下の髄外性形質細胞腫の猫の1例

A 12-year-old spayed female cat, presented with a subcutaneous mass on the right forelimb and was diagnosed with extramedullary plasmacytoma base on a biopsy. Blood chemistry was normal, and the cat underwent limb amputation for tumor resection. Histopathology confirmed extramedullary plasmacytoma, revealing also axillary lymph node metastases. Adjuvant chemotherapy with melphalan and prednisolone was started 11 days post-surgery, but was discontinued 12 days later due to the development of nonregenerative anemia, severe thrombocytopenia, and neutropenia. The cat died 58 days after the presentation, presumably due to progressive anemia.