目的 探讨儿童肘关节6个次级骨化中心的出现时间。 方法 通过医院图像存储与传输系统收集就诊于我院的8007例肘关节外伤患儿影像学资料，男4960例，女3047例；年龄为2~215月，其中男童中位年龄为66月（43~97月），女童中位年龄为56月（32~85月）。年龄分组按每间隔12月为一组，依次分为15组。 结果 50%以上的次级骨化中心出现最小年龄段女童均早于男童。女童肱骨小头、桡骨小头、内上髁、鹰嘴、滑车和外上髁出现时间分别为13月、71月、64月、108月、112月、122月，均早于男童的19月、82月、95月、132月、135月、145月。出现顺序依次为肱骨小头、桡骨小头、内上髁、鹰嘴、滑车和外上髁，但女童内上髁出现时间多早于桡骨小头。 结论 儿童肘关节6个次级骨化中心出现时间女童早于男童，男、女童均存在一定的出现顺序，有助于肘关节的临床阅片及骨龄评估。
关键词：
次级骨化中心; ; ; 肘关节; ; ; 儿童
Objective To investigate the appearance time of six secondary ossification centers of elbow in children. Methods The radiological data of 8007 children with elbow trauma in our hospital were collected through Picture Archiving and Communications System (4960 males and 3047 females). Age was ranged from 2 months to 215 months, with a median age of 66 (43-97) months for boys and 56 (32-85) months for girls. Age groups were divided into 15 groups at 12-month intervals. Results In more than 50% of secondary ossification centers appeared, the youngest age group of girls was earlier than that of boys. The appearance of capitulum, radius head, internal epicondyle, olecranon, trochlea, and external epicondyle in girls was 13 months, 71 months, 64 months, 108 months, 112 months, and 122 months, respectively, earlier than that of boys at 19 months, 82 months, 95 months, 132 months, 135 months, and 145 months. The six secondary ossification centers appeared in the sequence of capitulum, radius head, internal epicondyle, olecranon, trochlea, and external epicondyle, while the appearance of internal epicondyle in girls was earlier than radius head. Conclusions The appearance of secondary ossification center of Children's elbow in girls is earlier than in boys, and there is a certain sequence of appearance, which is helpful for film reading and bone age evaluation of elbow.
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