All the following are "head at risk sig (radiological) that correlate positively with results in the outcome of Pehes' disease except: (A) Lateral subluxation of the femoral head, (B) Speckled calcification lateral to the capital epi, (C) Shallow acetabulum, (D) Gage sign-a radiolucent 'V' shaped defect. Lateral epiphysis and adjacent metaphysis.
Answer is C. Shallow acetabulum A shallow acetabulum correlates poorly with outcome in congenital dislocation of hip. In addition to a, band d other 'Head at Risk' signs are diffuse metaphyseal reaction and horizontal physis.