病例：患儿男，14岁，因间断全血细胞减少4年10个月、低热卫周、鼻衄一小时于1998年2月2日入我科。患儿曾于1993年4月因“间断鼻衄1年余，乏力、苍白3个月”第一次住我科，当时查体：重度贫血貌，肝脾及全身浅表淋巴结不大，心肺腹（一），血象：Hb54g／L，RBC2．34X1012／L， Case: children male, 14 years old, due to interrupted pancytopenia 4 years and 10 months, low fever Wei Zhou, epistaxis one hour on February 2, 1998 into my department. Children in April 1993 for “intermittent epistaxis more than 1 year, fatigue, pale for 3 months” for the first time live in our department, was physical examination: severe anemia, liver and spleen and systemic superficial lymph nodes, heart and lungs Abdominal (a), blood: Hb54g / L, RBC2.34X1012 / L,