MRI
Sagittal STIR
Sagittal T1
T1 fat sat
Sagittal T1 C+ fat sat
Axial T2 fat sat
Axial T1
Axial T1 fat sat
Coronal T1
Coronal T1
Coronal T1 C+ fat sat
Axial DWI
ADC
The lesion demonstrated on the plain film is T1 hypointense, T2/STIR hyperintense and enhances following contrast. There is accompanying diffusion restriction. No periosteal reaction or soft tissue mass. The lesion is mixed sclerotic-lytic with features of an aggressive lesion, but no periosteal reaction. In this location, the most likely diagnosis is adamantinoma.