Bilateral proximal radioulnar synostosis

Case contributed by Dr Tito Alfredo Atencia Rincon


At school, some difficulty is noticed when it comes to using the cutlery to eat and also to write. There was no pain or any other symptomatology. On examination, a limited supination was seen in both forearms, achieving maximum supination in an intermediate position, leaving the hands with the thumb up, causing pain when trying to supinate. Elbow flexion was normal and extension was limited by 10 °.

Patient Data

Age: 16
Gender: Male

Density and morphology of osseous structures are within usual limits. Bone fusion at the level of the proximal cubital and radial aspect bilaterally, in the configuration of proximal radioulnar synostosis.

Case Discussion

Congenital radioulnar synostosis is a rare bone disorder that can occur isolated or associated with other disorders and that is characterized by a failure in the segmentation of the radius and ulna during embryonic development, limiting the movements of rotation of the forearm, which can lead to difficulties in some activities of daily life.

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Case information

rID: 63629
Published: 15th Oct 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included
Institution: Luisa C. Gandulfo Hospital, Lomas of Zamora, Buenos Aires - Argentina

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