Our first pilot study on this matter (2005) stated that volar synovitis is more correlated to clinical examination than dorsal one. [14] Several studies have addressed volar synovitis so far.

Studies of patients with PMR and giant-cell arteritis indicate that PMR could be a vasculitis limited to the subclavian or axillary arteries, or a synovitis or perisynovitis of the shoulders and hips.

The prevalence of hip dysplasia and hip dislocation is 2 to 5%—a thousand times that of all other named (1) pediatric hip disorders, with the exception of transient synovitis (0.076%).