<prompt> Which of the following statement is not true about Coxa Plana:Occur more commonly in femalesCommonly affect children in first decadeAbduction in flexion is restrictedLateral subluxation of femoral head on x-rays  <response>: Ans. A. Occurs more commonly in females. Coxa plana is pert hes disease. It is osteonecrosis of the proximal femoral epiphysis in a growing child caused by poorly understood factors. It affects male females during first decade of life. Most common symptom is limp. During early phase, joint is irritable so extremes of all the movements are restricted and painful. Later, most movements are full but abduction, especially in flexion is almost always limited. When hip is flexed, it goes into ER. 