Ewing Sarcoma

Ai
Authors:
Ewing-Sarcoma-A-Axi-T1WI.jpg

A

Ewing-Sarcoma-B-Axi-T2WI.jpg

B

Ewing-Sarcoma-C-Axi-T1WI

C

Ewing-Sarcoma-D-Cor-T1WI

D

Clinical History: 
This 15-year-old young boy presented clinically with a complaint of slow onset of a temporal headache, with subsequently vomiting which being serious in the last several weeks. After a physical exam that revealed swelling in the region of the right temporal bone with local tenderness, the patient was referred for a MR exam and received subsequent surgical treatment.

Diagnosis:
Ewing Sarcoma of the right temporal bone

MR Technique: 
MR images were acquired on a 1.5 T 8-channel MR unit, using the following sequences: (A) axial pre-contrast spin echo T1-weighted (TR/TE 380/14ms, 320×192 matrix), (B) fast spin echo T2-weighted fat-suppression(TR/TE 3900/84ms), and (C)axial post contrast spin echo T1-weighted and (D)coronal spin echo fat-suppressed T1-weighted scans.

Imaging Findings:
A large soft tissue mass based on the temporal bone can be seen adhering to the internal plate of right temporal bone. The right temporal lobe is compressed. The inner cortex of the right temporal bone is discontinuous. The adjacent diploic space is invaded by the soft tissue mass. On post-contrast scans, the tumor has heterogeneous prominent enhancement, but appears well-demarcated.