A 30-year-old male HIV positive on antiretroviral therapy has pain in right hip region. Flexion, abduction and external rotation deformity of right hip for 2 months, what is the most likely diagnosis?

(b) TB hip in HIVAVN hip in HIVIncidenceMore CommonLess CommonDeformityFABER-stage of synovitis may be prolonged on treatment, then subsequently with onset of arthritis - FADIRLimitation of abduction and internal rotation so initially position is adduction and external rotation (opposite to movements limited) and than subsequently with onset of arthritis FADIR Unilateral (usually)Bilateral (usually)