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Congenital dislocation of the head of the radius.

Congenital dislocation of the head of radius, not associated with other skeletal deformity or syndrome, is a rare condition. We consider this as an entity of its own that has also to be distinguished from congenital recurrent dislocation of the radial head. Abbott (1892) was the first to report 9 cases of this condition; its complete description, however, was in McFarland's article ( 1930) with 11 cases. A few case reports of this deformity have been published (Bonneberg 1892, Powers 1903, Meng 1940, Rose & Thomas 1938, Magee 1947, Caravias 1957, Cockshott et al. 1958). England discussed 21 cases he had seen. Recently, E. E. Almquist et al. (1969) found only 4 isolated congenital radial head dislocations among their 18 cases. We will present 3 isolated cases of the above condition, describe their clinical and radiological pictures, and the results of their treatment.