Figure 2
Imaging of a 7 years old boy (case 2) referred for the treatment of missed Monteggia lesion. His internal time between injury and operation was 8 months. (a) Preoperative X-ray. (b) Preoperative MRI. Axial T2-weighted images demonstrated the proximal radioulnar joint was dislocated and the appearance of the radial notch (the arrow) was flat; coronal T1- and T2-weighted images showed the radial notch of the ulna was hyperplasia (the arrow); sagittal T1-weighted images showed the dislocation of the humeroradial joint and the concave radial head (the arrow) combined with the folded and tortuousness annual ligament in the joint. (c) Open reduction and ulnar osteotomy with reconstruction of the annular ligament and a humeroradial pin was undertaken. (d) The radial head subluxated (Grade 3) at 2 years after operation.
