Archives of the AFIP -- RadioGraphics

Figure Legend | Panel A | Panel B | Panel C | Panel D

Figure 6: GCT of the sacrum in a 39-year-old woman with sacrococcygeal pain. Panel A CT scan shows an expansile lesion in the lower sacrum associated with an anterior soft-tissue mass (arrowheads). (B and C) Sagittal T1-weighted Panel B and axial T2-weighted Panel C MR images reveal the large area of sacral destruction and the soft-tissue mass (large arrows) that spare the upper sacrum (*). The largely low to intermediate signal intensity of the neoplasm on T2-weighted MR images is caused by fibrosis, rather than hemosiderin, as seen at histologic analysis. A focus of hemorrhage (small arrow) has high signal intensity on both b and c. Panel D As seen from this sagittal section of the resected specimen, the gross pathologic findings of sacral involvement (arrowheads) and anterior soft-tissue extension (arrows) correlate well with the radiologic findings. The upper sacrum (*) is spared.

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