病例1，男，24岁。1994年6月诊断为急性淋巴细胞白血病L2型。免疫分型：B细胞型。外院应用VDP方案化疗2周后于1994年6月27日入院。骨髓原幼淋细胞1％。已达完全缓解。两次化疗后10月在307医院行异基因骨髓移植。移植后1个月出现胸壁皮下结节。1995年1月皮下给节明显增大。2月再 Case 1, male, 24 years old. In June 1994, L2 type of acute lymphoblastic leukemia was diagnosed. Immunophenotyping: B cell type. The hospital was admitted to the hospital on June 27, 1994 after 2 weeks of chemotherapy with the VDP protocol. The original bone marrow cell lineage was 1%. Completely relieved. Allogeneic bone marrow transplantation was performed at 307 hospitals in October after two cycles of chemotherapy. Chest wall subcutaneous nodules appeared one month after transplantation. In January 1995, the number of subcutaneous feedings increased significantly. February again