Congenital Radioulnar Synostosis
Although congenital proximal radioulnar synostosis is an uncommon malformation of the upper extremity, first described by Sandifort in 1973 (Simmons et al. 1983), congenital radioulnar synostosis (RUS) is the most common congenital functional disorder of the elbow joint (Siemianowicz et al. 2010). In most cases, RUS is an isolated defect involving only one limb. However, bilateral RUS is usually familial and affects males more than females (Figs. 1–3).
KeywordsChromosome Anomaly Radial Head Williams Syndrome Fetal Alcohol Syndrome Noonan Syndrome
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