Published 2/1/2010

What’s your diagnosis?

Last month, Stephen A. Albanese, MD, submitted three images and challenged AAOS Now readers to identify the condition. Dr. Albanese provided the following patient information:

“The radiograph and magnetic resonance images are of a 10-year-old boy who was seen in the office. The patient said he had been experiencing pain in his left hip since a minor trauma that occurred 12 days before the appointment. The pain completely resolved within a week after the images were taken, and the patient remains asymptomatic.”

John M. Purvis, MD, of Pediatric Orthopaedic Specialists of Mississippi, was first to respond. “Off the top of my head, osteopoikilisos, right?” Right you are, Dr. Purvis!

Radiograph (A) and magnetic resonance images (B and C) of a 10-year-old boy complaining of pain in the left hip. The pain was triggered by a minor trauma that occurred 12 days prior to the taking of the images; it had resolved completely within a week after the images were taken.

Christopher S. Vara, MD, a candidate member in Ft. Worth, Texas, provided his thinking on the diagnosis. “Small, homogeneous, symmetric, round, radiodense regions…pelvis, epiphysis, metaphysic…young age…unrelated, incidental traumatic event—osteopoikilisos.”

Third to respond was Douglas J. McDonald, MD, of Washington University School of Medicine. He, too, correctly identified the condition as osteopoikilisos.

Watch next month’s AAOS Now for another challenge.