Osteosarcoma | Figure 1

CincyKidsRad

Cincinnati Children's Radiology

Osteosarcoma

Radiograph of the shoulder (image 1) shows a destructive osteosarcoma (arrowhead) of the proximal left humerus with an associated soft tissue mass (arrow). Sagittal STIR (image 2) and T1-weighted postcontrast MRI (image 3) highlight the bone tumor (arrow). Osteosarcoma is the most common primary bone tumor in children, with most patients diagnosed before the age of 20. The tumor most commonly occurs around the knee, with the humerus being the third most common location.

Similar cases

Coronal T2-W MRI in the same patient shows the expansile mass of the distal femur. The arrow highlights the uplifted periosteum caused by extension of the mass. The differential diagnosis for the x-ray includes osteosarcoma and Ewing sarcoma.

Noncontrast CT in an adolescent with metastatic osteosarcoma shows multiple ossific metastases including within the liver (arrows), kidneys (arrowheads) and pancreas (dashed arrow).

Osteosarcoma: This is an X-ray of a Tibia showing a classical conventional osteosarcoma of the upper Tibia.

Coronal CT, T2 weighted MRI, and T1-weighted postcontrast MRI show a large osteosarcoma (arrow) arising from the left periacetabular portion of the pelvis.