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Transverse fracture of the olecranon process with a gap as well as comminution of the displaced fragment. No involvement of the coronoid process.Findings consistent with type II b fractured olecranon.
Mild oedema of the subcutaneous tissues overlying the posterior aspect of the elbow.
Olecranon fractures are classified:
Type I: nondisplaced or minimally displaced.
Type IA: noncomminuted
Type IB: comminuted
Type II: displaced proximal fragment without instability
Type IIA: no comminution with displacement
Type IIB: comminuted with displacement
Type III: Unstable ulnohumeral joint.
Type IIIA: no comminution.
Type IIIB: comminuted.