The pathogenesis related to the erythropoietin secretion from malignant tumors, while another factor might be the immunological disturbance of T-lymphocyte caused by thymoma.

• 其发病机制与恶性肿瘤分泌促红细胞生成素有关,也可能是胸腺瘤所致T细胞免疫功能紊乱所致。