Basal skull的用法和樣例：
例句
- Chordomas are rare tumors of notochordal tissue remnants and most frequently affect the sacrum and skull base.
摘要脊索瘤是來自脊索遺迹的罕見腫瘤，主要侵犯薦椎及顱底。 - There is no clear consensus on the management strategy for skull base metastasis from differentiated thyroid carcinoma.
關於分化型甲狀腺癌顱底轉移的治療策略，還沒有明確的共識。
