1. Presented by Edward McCarthy, M.D. and prepared by Natasha Rekhtman, M.D., Ph.D.

A 14 year-old boy sprained his knee. A radiograph demonstrated a well-defined lytic lesion in the distal femoral metaphysic. A biopsy was taken.

images/EMC 11 19 04 case 5 Case2c.jpg
images/EMC 11 19 04 case 5 Case2d.jpg
images/nofdfap5p.jpg