患儿 ,男 ,8岁。于入院前半个月由家长偶然发现其左肘前方隆起 ,似有一肿物。向后稍加按压“肿物”即消失 ,松手即恢复原状。患儿无任何自觉症状 ,关节活动无障碍 ,即来院就诊。详细询问病史 ,未曾有损伤史。家长也称除最近时期外从未发现如此现象。检查见患儿一般情况及发育良 Children, male, 8 years old. Two months before admission, the parents accidentally discovered that the front of his left elbow bulge, like a tumor. Pressing the “tumor” slightly backwards disappears and the hand is released. The children had no symptoms and joint activities were not accessible. Detailed medical history, no history of injury. Parents also said that this phenomenon has never been discovered except in the recent period. Check the general condition and development of children