Congenital synostosis of the proximal ends of the radius and ulna is a rare malformation which often completely prevents pronation and supination of the forearm.According to Wilkie (1914) the first case was described in 1793 by Sandifort in his Museum Anatomicus.Perusing the literature up to 1964, Jeanty found that so far a total of about 220 cases had been published.During the period 1912-1967, a total of 124 patients with congenital malformations of the forearm were seen in the Orthopaedic Clinic in Munich.Among these patients Albrecht ( 1967) found 7 with congenital radio-ulnar synostosis.
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Hansen et al. (1970) studied this question.
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