Osteoblastic Osteosarcoma Arising beneath an Osteochondroma in an 11-Year-Old Male with Multiple Hereditary Exostoses

<div>(a) marked swelling and induration of the left distal femur and (b) X-ray shows bone outgrowths (exostoses) on the medial and lateral aspects of the distal femur bilaterally and left metaphyseal widening (AP view).</div>

Case Reports in Orthopedics

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Figure 1

Figure 1: Osteoblastic Osteosarcoma Arising beneath an Osteochondroma in an 11-Year-Old Male with Multiple Hereditary Exostoses 