The subgroups represent a variation within the group and the one illustrated is indicated with red in the text.
A1 Extra-articular unifocal fracture, tuberosity
.1 greater tuberosity, not displaced
.2 greater tuberosity, displaced
.3 with a glenohumeral dislocation
A2 Extra-articular unifocal fracture, impacted metaphyseal
.1 without frontal malalignment
.2 with varus malalignment
.3 with valgus malalignment
A3 Extra-articular unifocal fracture, non-impacted metaphyseal
.1 simple, with angulation
.2 simple, with translation
.3 multifragmentary
B1 BA extra-articular bifocal fracture, with metaphyseal impaction
.1 lateral + greater tuberosity
.2 medial + lesser tuberosity
.3 posterior + greater tuberosity
B2 Extra-articular bifocal fracture, without metaphyseal impaction
.1 without rotatory displacement of the epiphyseal fragment
.2 with rotatory displacement of the epiphyseal fragment
.3 multifragmentary metaphyseal + one of the tuberosities
B3 Extra-articular bifocal fracture, with glenohumeral dislocation
.1 "vertical" cervical line + greater tuberosity intact + anterior and medical dislocation
.2 "vertical" cervical line + greater tuberosity fractured + anterior and medial dislocation
.3 lesser tuberosity fractured + posterior dislocation
C1 Articular fracture, with slight displacement
.1 cephaotubercular, with valgus malalignment
.2 cephalotubercular, with varus malalignment
.3 anatomical neck
C2 Articular fracture, impacted with marked displacement
.1 cephalotubercular, with valgus malalignment
.2 cephalotubercular, with varus malalignment
.3 transcephalic and tubercular, with varus malalignment
C3 Articular fracture, dislocated
.1 anatomical neck
.2 anatomical neck and tuberosities
.3 cephaltubercular fragmentation