Any of various acute or chronic neoplastic diseases of the bone marrow in which unrestrained proliferation of white blood cells occurs, usually accompanied by anemia, impaired blood clotting, and enlargement of the lymph nodes, liver, and spleen.

• 白血病一种急性或慢性骨髓赘生疾病，其中白血球不受控制地增生，通常伴随有贫血，受损血液出现凝块及淋巴结、肝和脾肿大