Self-limiting inflammatory process of the hip
Most common cause of acute hip pain in children <10yr
Peak incidence 3-8yrs, with a mean of 6 yrs
Male:Female is 2:1
Usually unilateral
32-50% present after recent viral URI
Possible posttraumatic or allergic pathologies
Peak incidence 3-8yrs, with a mean of 6 yrs
Transient 
Acute rheumatic fever
Sequential 
Developmental dysplasia of hip
SNRI Toxicity
Femur fracture
Quick Sequential 
Juvenile idiopathic arthritis