PROBLEM
A 14-year-old boy complains of pain in his right hip that has persisted for several months. What is your interpretation of these frontal and frog-leg views of his hips?

CLICK HERE FOR ANSWER

ANSWER
The correct answer is slipped capital femoral epiphysis of the right hip. The diagnosis is
indicated by the lucency of the metaphysis adjacent to the epiphyseal line in the frontal view and the inferior slippage of the femoral head in the frog-leg view (arrows). This disease is characteristically seen in adolescents and may be bilateral.

This series of diagnostic quizzes that challenge your ability to read a variety of x-ray films is edited by Dr. Keats, alumni professor of radiology at the University of Virginia School of Medicine in Charlottesville. Emerg Med 38(10):69-70, 2006