Key words: Rheumatoid Arthritis, Reactive Arthritis, Technetium 99m HIG

Objective: In this study, it was aimed to investigate the agreement between early phase of bone scintigraphy – human immunoglobulin scintigraphy (EPBS-HIG) and late phase bone scintigraphy – HIG (LPBS-HIG) in the determination of the presence and also the severity of inflammatory arthritis. Material and Methods: Twenty-eight patients (23 female, 5 male; between 19 to 80 years of age) with inflammatory arthritis were included in the study. Tc-99m HIG and blood pool/late phase bone scintigraphies were performed in all patients. In scintigraphic exami-nations, the joints were scored with the degree of accumulation of the radiopharmaceutical by the semiquantitative analysis (0=Background activity, 1=Faint uptake, 2=Moderate uptake, 3=Marked uptake) which is called as visually active joint score as severity index of the disease. To estimate the agreement between EPBS – HIG and LPBS- HIG in the determination of the presence and severity of inflammatory arthritis, 2x2 kappa coefficients were calculated. Results: Our results showed good agreement between EPBS- HIG for the presence of inflammation (kappa: 0.72) but not for the severity of th