BACKGROUND
Concurrent rheumatoid factor seropositivity is occasionally detected in ankylosing spondylitis and often causes confusion in clinical routine. Overlap between various seronegative arthritides is a known but uncommon association. Differentiation of spondyloarthropathy from rheumatoid
This study is a retrospective single case series. Two hundred and thirty-seven patients were treated with jackyakamcho-tang (JKT) for relief of muscle spasm and pain; 81 of them were included in analysis. (The others were excluded because of insufficient medical records to confirm the diagnosis or