PMC3418014_01
Figure 1: MRI of right gluteal region
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F1
T1 -weighted and hyperintense on T2 -weighted images with marked heterogeneity (Fig. 1). The mass was abutting the right iliac blade, though the cortical outline of the bone was well maintained.
Figure 2: Well differentiated and poorly cellular fibrous tissue with no increased mitotic activity, nuclear pleomorphism or necrosis.
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F2
Surgical margins of resected specimen were not free of tumor (Fig. 2).