X-ray (front view) of the pelvis in a 63 year old female patient, showing severe osteoarthritis in the hip joint (at left) due to slipped capital femoral epiphysis (SCFE) at birth. SCFE is an unusual disorder of the thigh bone (femur) when the ball at the head of the femur slips off backwards where it articulates with the hip bone. This leads to one leg being shorter than the other and the patient walks with a limp.