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An intramedullary mass is detected in the femur causing cortical destruction.
A large mass of soft tissue surrounds the femur, a finding that is consistently found in round cell tumors.
The mass shows an intermediate T1 signal, slightly higher than the muscle. Medium to low signal in T2 sequences and high signal in STIR images and fat suppressed images. Contrast enhancement is seen intravenously based on gadolinium injection of contrast medium.