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Coronal.jpg
Coronal.jpg Periosteal.jpg

Diagnosis:

Subperiosteal abscess

Findings:

There is diffuse soft tissue edema around the proximal femur. Abnormal signal in the femoral metaphyses is consistent with osteomyelitis. Fluid collection is positioned deep to the periosteum.

Diff Dx:

Subperiosteal hematoma, which would demonstrate hyperintense signal on T1 weighted images.