晚发性维生素K缺乏症是指新生儿晚期(生后两周)到婴儿期因缺乏维生素K而引起的出血性疾病。临床上晚发性维生素K缺乏症可分为特发性和继发性两种。1996~2008年笔者共收治晚社区临床实践发性维生素K缺乏症10例,现报道如下。1资料与方法1.1临床资料10例患儿中,男8例,女2例;年龄28 Late-onset vitamin K deficiency is a hemorrhagic disease caused by a lack of vitamin K in the late neonatal period (two weeks after birth) until infancy. Late clinical vitamin K deficiency can be divided into idiopathic and secondary two. From 1996 to 2008, the author treated a total of 10 cases of vitamin K deficiency in clinical practice in the late community and is reported as follows. 1 Materials and Methods 1.1 Clinical data 10 cases of children, 8 males and 2 females; age 28