A 1-month-old male born at term is brought to the pediatrician for a follow-up examination. Ortolani and Barlow maneuvers of the left hip demonstrate a “clicking and clunking.” Which of the following is the next best step in diagnosis and the most likely explanation for these findings?
Ultrasound; acute inflammation of synovial lining
Ultrasound; avascular necrosis
Ultrasound; poorly developed acetabulum
Ultrasound; slippage of epiphyseal plate
X-ray; acute inflammation of synovial lining
X-ray; avascular necrosis
X-ray; poorly developed acetabulum
X-ray; slippage of epiphyseal plate
