晚发性维生素Ｋ（Ｖｉｔｋ）缺乏症起病急骤，出血严重，且以自发性颅内出血为特征，预后不良。现将本院１９９３～１９９８年所收治的３０例本症患儿进行临床分析，报道如下。ｌ临床资料ｌ．１一般资料本组３０例中男２３例，女７例，年龄＜１个月３例，１～３月２７例；母乳 Late onset vitamin K (Vitk) deficiency onset is abrupt, severe bleeding, and is characterized by spontaneous intracranial hemorrhage, the prognosis is poor. Now the hospital from 1993 to 1998 were treated in 30 cases of children with clinical analysis of the disease, reported as follows. l clinical data l. 1 General Information The group of 30 patients, 23 males and 7 females, age <1 month in 3 cases, 1 March to 27 cases; breast milk