Rapidly Progressive Osteoarthritis of the Hip: A Prospective Study.

Rapidly progressive osteoarthritis of the hip (RPOH) is a rare syndrome that involves the femoral head and acetabulum. We analyzed the incidence of RPOH in 2022. The inclusion criteria included a clinical history of pain for 1-6 months and a decrease in joint space of > 2 mm within one year or a decrease in joint space by 50% in that time accompanied by femoral and/or acetabular bone destruction.