Diagnosis

12-A2 Simple fracture, oblique (>30°)

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12-A2

12-A2

Simple fractures of the humeral shaft with an oblique fracture line (>30°) are classified as 12-A2 fractures.

Fractures located in the proximal third (12-A2.1) or in the distal third (12-A2.3) of the humerus are usually more displaced and more unstable than those in the middle third (12-A2.2).

12-A2

12-A2

X-ray taken from Orozco R et al, (1998) Atlas of Internal Fixation. Used with kind permission.