婴儿期因晚发性维生素K（简称VK）缺乏出血症是婴儿期常见的出血性疾病，以颅内出血多见，病死率和致残率高。若能早期诊断及时用VK治疗可改善预后。现将本院1986～1996年收治的32例报告如下。1临床资料男22例，女10例。32例患儿均在出生后25天～2月内发病。纯母乳喂养32例。81 Infancy due to late onset of vitamin K (referred to as VK) lack of bleeding is a common hemorrhagic disease in infancy, to more common intracranial hemorrhage, mortality and morbidity high. If early diagnosis and timely treatment with VK can improve the prognosis. Now this hospital from 1986 to 1996 admitted 32 cases are as follows. 1 clinical data of 22 males and 10 females. 32 cases of children were born within 25 days ~ 2 months of onset. Breastfeeding in 32 cases. 81