Mutch classification of greater tuberosity fractures

Last revised by Mostafa Elfeky on 28 Jun 2023

The Mutch classification is a system used to classify isolated greater tuberosity fractures and has important therapeutic implications. It is considered reliable for isolated greater tuberosity fractures but is less reliable in multi-part proximal humeral fractures 4.

The Mutch classification system divides greater tuberosity fractures into three types 2:

  • type 1: avulsion fracture involve a small fragment of bone and the fracture line is horizontal

  • type 2: split fracture involves a large fragment with a vertical fracture line

  • type 3: depressed fracture involves a fragment that is displaced inferiorly, the fragments are impacted into the humeral head and are generally nondisplaced

Jennifer Mutch et al proposed this classification system into three types in 2014 2.

Fragments of the greater tuberosity with the rotator cuff attached characteristically have a longitudinal tear in the cuff between the supraspinatus and subscapularis tendons.

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