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Figure 5. (a) (Case 10) Radiograph shows an expansile lesion in the left femoral neck and upper shaft with a thick sclerotic rim and matrix calcifications. (b) (Case 10) Coronal T1 weighted image shows an isointense (to skeletal muscle) lesion with some foci of hypointensity in the distal portion. (c) (Case 10) Coronal fat-suppressed T2 weighted image shows a heterogeneously hyperintense lesion with small hypointense foci distally. (d) (Case 10) Coronal contrast-enhanced fat-suppressed T1 weighted image shows patchy enhancement of most of the lesion. The hypointense foci in the distal aspect of the lesion seen on the T2 weighted image do not enhance and are consistent with calcifications seen on the radiograph. The more proximal area that is T1 and T2 isointense may represent non- or minimally enhancing fibrous tissue.
