A 3799-g (8-lb 6-oz) female newborn is born by cesarean delivery because of a breech presentation. Apgar scores are 7 and 9 at 1 and 5 minutes, respectively. Initial examination shows a palpable clunk when the left hip is abducted, flexed, and lifted forward. Posterior pressure on the flexed hip elicits a similar clunk. The remainder of the examination shows no abnormalities. Which of the following is the most likely diagnosis?A) Congenital hip dysplasia B) Legg-Calvé-Perthes disease C) Osgood-Schlatter disease D) Osteogenesis imperfecta E) Slipped capital femoral epiphysis
