Table 10.

Walch classification

Category		Description
A	A1	Humeral head centered on the glenoid fossa. No or minor central erosion.
	A2	Humeral head centered on the glenoid fossa. Major central erosion.
B	B1	Posterior subluxation of the humeral head. No posterior bone loss.
	B2	Posterior subluxation of the humeral head. Posterior bone loss resulting in a biconcave glenoid.
C		Glenoid retroversion $>$ 25∘

Walch classification (Table 10): this classification has been designed to analyze glenoid morphology in glenohumeral OA and includes three different groups with subtypes.