患儿,男,4岁半。因脐周隐痛,口服复方甲苯咪唑驱蛔虫,每日2片,连服2日。首次服药后约8小时腹痛加重。经解痉对症治疗无效,予氧气驱虫,大便排出蛔虫2条,但腹痛仍无缓解。服药后6天解暗红色大便,隐血“+++”,以“消化道出血”收入我院外科,经禁食,对症支持治疗5天无效。患儿下肢皮肤出现紫癜,以“过敏性紫癜”转入我科。查体:痛苦面容,腹软,肝脾未 Children, male, 4 and a half years old. Due to umbilical pain, oral compound mebendazole drive roundworm, 2 tablets daily, and even served on the 2nd. About 8 hours after the first dose of abdominal pain aggravated. After antispasmodic symptomatic treatment is invalid, to oxygen parasite, stool excreted 2 roundworms, but still no relief of abdominal pain. 6 days after taking solution of dark red stool, occult blood “+++” to “gastrointestinal bleeding” income in our hospital surgery, fasting, symptomatic and supportive treatment for 5 days is invalid. Children with purpura lower extremity skin to “allergic purpura” transferred to our department. Physical examination: painful face, belly soft, liver and spleen not