Congenital proximal radio-ulnar synostosis. Natural history and functional assessment.

Painful Snapping Elbow in Patients With Congenital Radioulnar Synostosis: Report of Two Cases

“…1 Most patients do not report pain or restriction of the flexion-extension arc. 2 We encountered 2 patients whose daily activities had been disturbed by painful snapping or locking of the elbow joint. Both patients had had congenital radioulnar synostosis with an anteriorly dislocated radial head.…”

Idiopathic distal radioulnar synostosis

“…Although it is common for congenital radioulnar synostosis to be diagnosed late, not immediately after birth, it is usually diagnosed at an earlier age than 16 years. In a series of patients with congenital radioulnar synostosis reported by Cleary and Omer the mean age of diagnosis was 6 years (range 6 months -22 years) [10]. Simmons et al reported the mean age at diagnosis to be 2.5 years of age [6].…”

Snapping Elbow With Congenital Radial Head Dislocation: Case Report

“…The previously reported cases of snapping or locking elbow associated with congenital radioulnar synostosis are summarized in Table 2. 11,24 -29 Seven of the 9 cases presented in Table 2 were found in teenagers, and all their elbow radiographs, according to the Cleary and Omer classification, 30 were classified as type IV with an open epiphyseal plate. Thus, the growth spurt of the radius and an anterior dislocation of the radial head might be more susceptible to snapping.…”