Ulnar fracture and radial head dislocation

Case contributed by Dr Jeremy Jones

Presentation

Fall onto outstretched arm from monkey bars. Deformed forearm and pain.

Patient Data

Age: 6
Gender: Male
Modality: X-ray

Obvious fracture of the ulna diaphysis. On the lateral view you might be tempted to call this a greenstick fracture but if you look carefully, the fracture extends all the way through the bone and, on the AP, there is malalignment.

On the lateral, the radial head does not align with the capitellum - it is dislocated.

Case Discussion

Don't undercall this as an incomplete greenstick fracture when it is an diaphyseal oblique fracture and there is an associated radial head dislocation.

When there is a radial or ulnar shaft fracture, look specifically for a fracture of the other bone, or a dislocation of the radial head or distal radioulnar joint.

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Case Information

rID: 41355
Case created: 27th Nov 2015
Last edited: 16th May 2016
System: Paediatrics
Inclusion in quiz mode: Included

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