我科自1990年～1997年，共收治晚发性维生素K缺乏症18例，现将临床资料、治疗与转归情况及远期随访结果简要报道如下。1临床资料1．1诊断标准18例患儿的诊断标准均参考松坂哲应提出的诊断标准：①母乳喂养儿；②生后2周～3个月突然发病；③急性或亚急性颅内出血；④呕血、便血 Our department from 1990 to 1997, were treated late onset of vitamin K deficiency in 18 cases, now the clinical data, treatment and outcome of the situation and long-term follow-up results are briefly reported as follows. 1 clinical data 1.1 diagnostic criteria 18 cases of children with diagnostic criteria refer to Matsuzaka Tsz should be proposed diagnostic criteria: ① breastfeeding children; ② 2 weeks after birth to 3 months a sudden onset; ③ acute or subacute intracranial hemorrhage; ④ vomiting, blood in the stool