在解剖学上颅底与鼻咽顶部相距只有1.0厘米,因此患鼻咽癌时常易早期侵及颅底骨,根据国外报道约占25%。在鼻咽癌的临床工作中又常依据颅底诸孔的破坏情况来判定鼻咽癌的进展期,故颅底 In the anatomical skull base and the top of the nasopharynx is only 1.0 cm, so often suffering from nasopharyngeal invasion of early skull base bone, according to foreign reports about 25%. In the clinical work of nasopharyngeal carcinoma is often based on the destruction of the holes in the skull base to determine the progress of nasopharyngeal carcinoma, so the skull base