A 13-year-old boy presents to the Emergency Department with thigh pain. His symptoms worsened after jumping into a swimming pool. On physical exam, he is a well-developed, obese boy who ambulates with a limp. The hip is externally rotated and adducted. X-rays of the pelvis are taken and shown above. What is the most likely diagnosis?
-Congenital hip dislocation
-Legg-Calvé-Perthes disease
-Slipped capital femoral epiphysis
-Transient synovitis