Fig. 3

a, b Forearm deformity progressed with age, radial head proximal migrant and the radial neck axis lateral deviation were found 3 years later after the first clinical assessment, and ulnar gradual lengthening with osteochondroma resection was performed at a 10-year-old. d, e Lateral radiograph of the same patient. c, f 2.1 years after the external fixator was removed, both the proximal radioulnar joint and the radiocapitella joint were well maintained