Resnik C S, Hartenberg M A
Pediatr Radiol. 1986;16(3):254-6. doi: 10.1007/BF02456301.
A 7-year 9-month-old boy sustained a transcondylar humeral fracture during a fall. Radiographs revealed a trochlear ossification center without evidence of a medial epicondylar center. This combination, although apparently quite rare, should be recognized as a normal variant.
一名7岁9个月大的男孩在一次跌倒中发生了肱骨髁上骨折。X线片显示有滑车骨化中心，但没有内侧髁上中心的迹象。这种组合虽然显然相当罕见，但应被视为一种正常变异。
