<prompt> Pehes affects age group4 yrs4 - 8 yrs10 - 25 yrs25 yrs  <response>: Ans. B. 4 - 8 yrsPehes disease is also known as osteochondritis deformans juvenilis or Coxa plana or Pseudocoxalgia.Pehes disease is an osteochondritis of the epiphysis of the femoral head capital femoral epiphysis.The disease occurs commonly in males in the age group of 5-10 years. 