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Figure 4. (a) (Case 14) Radiograph of the pelvis shows a well-defined lesion within the neck and intertrochanteric area of the right femur with a ground-glass appearance and minimal expansion of the bone. (b) (Case 14) Coronal T1 weighted image of the right femur shows the true extent of the lesion within the marrow. The lesion is larger than appreciated on the radiograph. It is predominantly T1 isointense with a more hypointense area in the distal portion. It is minimally expanded with well-defined margins. (c) (Case 14) Coronal fat-suppressed T2 weighted image shows shows a heterogeneously hyperintense lesion with a more markedly hyperintense area at its distal aspect. (d) (Case 14) Coronal contrast-enhanced fat-suppressed T1 weighted image shows heterogeneous enhancement with a non-enhancing area corresponding to the T1 hypointense and T2 markedly-hyperintense area in the distal portion, consistent with cystic change.
