随着异基因造血干细胞移植在白血病等血液系统恶性疾病中的运用,其带来的副作用也受到了广泛的关注。移植物抗宿主病(GVHD)是其目前最严重的并发症之一,同时也是影响预后的关键因素之一。GVHD有多个靶器官,主要是皮肤、肝脏和胃肠道。近年来,越来越多的临床医生意识到对于胃肠道GVHD的早期诊断和治疗可直接影响疾病的预后,因此其重要性也就日益突出。以往文献所报道的胃肠道GVHD的内镜表现多以成人为主,小儿胃肠道GVHD的内镜下表现鲜有报道, With allogeneic hematopoietic stem cell transplantation in leukemia and other hematological malignancies in the use of its side effects have also been widespread concern. Graft-versus-host disease (GVHD) is one of the most serious complication at present, and one of the key factors affecting the prognosis. GVHD has multiple target organs, primarily the skin, liver and gastrointestinal tract. In recent years, more and more clinicians realize that the early diagnosis and treatment of gastrointestinal GVHD can directly affect the prognosis of the disease, so its importance has become increasingly prominent. Previous reports of gastrointestinal GVHD endoscopic performance mostly adults, pediatric gastrointestinal GVHD endoscopic performance rarely reported,