<unk>  is a rare syndrome identified by symmetric polyarthritis,<unk> , acute<unk><unk>  of the back of the hands and/or feet, and a negative serum rheumatoid factor.
If no underlying disorder can be identified (idiopathic<unk> , this entity has an excellent prognosis and responds well to treatment.<unk>  typically involves the joints of the extremities, specifically the metacarpophalangeal and proximal interphalangeal joints, wrists, shoulders, elbows, knees and ankles.
It is more common in older adults, with the mean age between 70 and 80 years in most studies.
It occurs more often in men than in women with a 2:1 ratio.
It is unknown how common this condition is.
Remitting seronegative symmetrical synovitis with pitting edema
Seronegative spondyloarthritis
Psoriatic arthritis pathophysiology
Intermittent hydrarthrosis
Drug-induced lupus erythematosus pathophysiology
Statin induced myopathy pathophysiology
Subcutaneous panniculitis-like T-cell lymphoma
Progressive inflammatory neuropathy