MRI
Axial T2
Axial T2 fat sat
Axial T1
Coronal T2 fat sat
Coronal T1
Sagittal T2 fat sat
Coronal T1 C+ fat sat
Sagittal T1 C+ fat sat
Axial T1 C+ fat sat
Axial ADC
Axial DWI
Lobulated expansile enhancing necrotic mass lesion with water restriction centered in the left iliac bone that crosses the sacroiliac joint and involvement of S1 vertebra.
Pressure effect with displacement and secondary invasion of the mass to the left iliacus and gluteus muscles.
Another small similar enhancing skip osseous lesion along with left acetabulum posterior wall.