恶性肿瘤自发消退十分少见。其发生率约为恶性肿瘤的1/80,000。确实机制未明。在白血病中,急性白血病的自发缓解较慢性白血病相对多见,在急性白血病中,儿童病例又较成人病例多见。急性白血病自发完全缓解前之全血细胞减少及骨髓有核细胞增生明显减低,与药物诱导的完全缓解过程相仿。自发缓解的诱因多数为严重感染,但也可为子痫等应激状态。自发完全缓解的期限一般为数周至数月,但也有长达10～12年者。近年来,我院见到2例急性白血病合并严重感染后自发完全缓解,现对其中1例Schilling氏型单核细胞性白血病报道如下。王××,男,66岁,住院号122197,入院日期1980年1月16日。因寒战、高热、咳嗽、胸痛3天, Malignant tumor spontaneous regression is very rare. The incidence is about 1 / 80,000 of malignant tumors. The mechanism is not clear. In leukemia, spontaneous remission of acute leukemia is more common than chronic leukemia, and in acute leukemia, children are more common than adult cases. Acute leukemia spontaneous complete remission of the pancytopenia and bone marrow significantly decreased nucleated cell proliferation, and drug-induced complete remission is similar. Most of the incentives for spontaneous remission of severe infection, but also for the eclampsia and other stress conditions. Spontaneous complete remission of the general period of several weeks to several months, but there are up to 10 to 12 years. In recent years, our hospital to see two cases of acute leukemia with severe spontaneous complete remission, now one of the cases of Schilling’s type of monocytic leukemia are reported below. Wang × ×, male, 66 years old, hospital number 122197, admission date January 16, 1980. Due to chills, fever, cough, chest pain for 3 days,