Table 1.

Palazzi classification

Stage	Clinical presentation
I. Transient synovitis	Secondary prophylaxis is indicated for 6 months Following therapy, the presenting synovitis should resolve
II. Persistent synovitis	Increase in synovial membrane thickness, joint effusion and decreased ROM and peri-articular muscle atrophy
III. Chronic haemophilic arthropathy	Significant muscle atrophy and contractures
IV. Ankylosis	Fibrous or bony ankylosis