Assertion: sacrum | /r/HasProperty | figure 3
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Source sentences:
text: They are slowly growing tumors that can sometimes involve bone, particularly the sacrum.43 Sacral ependymomas arise from ependymal cells of the terminal filum, expand the sacral canal, and are usually of the myxopapillary type or metastases from a primary tumor of the central nervous system, causing an erosive mass of the sacrum (Figure 3).