A 14-year-old male presents with acute onset of inability to walk and severe pain in the left groin, thigh, and knee. He is afebrile and appears nontoxic but is obviously distressed. Examination shows an externally rotated thigh and apparent limb shortening. What is the MOST likely diagnosis?
(A) Legg-Calvé-Perthes disease (coxa plana)
(B) Slipped capital femoral epiphysis (SCFE)
(C) Septic arthritis of the hip
(D) Toxic tenosynovitis of the hip
(E) Osgood-Schlatter’ s disease