Extraarticular 2-part, greater tuberosity, displaced

This fracture subgroup consists of fractures of the greater tuberosity which are superiorly and/or posteriorly displaced.

The typical displacement of the greater tuberosity is posterosuperiorly.

A displacement more than 5 mm is usually considered significant and should be treated surgically.

These fractures are unifocal extraarticular proximal humerus fractures involving the greater tuberosity. The greater tuberosity is the attachment of supraspinatus and infraspinatus tendons and its integrity is important for proper shoulder function. Proximal displacement, even as little as 5 mm, of a fracture of the greater tuberosity compromise shoulder abduction. This is due to tuberosity impingement on the coracoacromial arch and/or shortening of the involved rotator cuff tendons.