Radiological Classification of Glenoid Deformity in Rheumatoid Arthritis

Figure 1

Oizumi classification. Grading of upper migration of humeral head. The inferior half of the glenoid is divided into 3 zones. The grade is defined by the position of the inferior border of the articular surface of the humeral head in the following zones: grade 0, the inferior border of the articular surface of the humeral head is below the lower glenoid rim; grades I, II, and III, the inferior border of the articular surface of the humeral head is in each zone; grade IV, the inferior border of the articular surface of the humeral head is above zone III.