患儿，男，１岁。因无明显诱因右侧鼻腔反复少量出血和鼻涕带血半个月，在当地几家医院和我科门诊行一般处理无效，于１９９８年１０月２１日再次来我科就诊。鼻部检查：外鼻无畸形，右鼻腔可见较多血性鼻涕，去除鼻腔分泌物见鼻腔粘膜轻度充血，鼻甲大小正常，未见出血病变。? Children, male, 1 year old. Because there is no obvious incentive to the right side of the nose repeated a small amount of bleeding and blood in the nose for half a month, several local hospitals and our out-patient clinic general treatment is invalid, on October 21, 1998 to our department again. Nasal examination: no external nasal deformity, the right nasal cavity can be seen more bloody nose, nasal secretions to see the nasal mucosa mild congestion, normal nasal size, no bleeding lesions. ?