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目的显示口腔颌面部复发性肿瘤侵犯中颅底的ＣＴ表现。方法３７例口腔颌面部复发性肿瘤患者被行以横轴面和冠状面（２６例）ＣＴ检查，所有病变均经病理检查证实。结果ＣＴ上显示的中颅底破坏方式有四种：（１）颅底骨外板吸收（５例）；（２）颅底骨内外板均吸收（２４例）；（３）卵圆孔扩大（３例）；（４）颅底骨硬化和吸收并存（５例）。复发性肿瘤破坏中颅底最多的结构是蝶骨大翼（３６例）。ＣＴ显示病变侵入颅内者共２４例，受累的颅内结构有海绵窦（１６侧），大脑颞叶（１５侧）和脑垂体（１例）。结论ＣＴ上显示的颅内侵犯与上述中颅底破坏方式密切相关。ＣＴ检查有助于临床上评价颌面复发性肿瘤侵犯中颅底。
Objective To show CT manifestations of mid-skull base invaded by recurrent tumors of oral maxillofacial region. Methods Thirty-seven patients with recurrent oral and maxillofacial tumors underwent CT scan with transverse and coronal planes (26 cases). All the lesions were confirmed by pathology. Results There were four ways of the destruction of the skull base on CT: (1) the absorption of skull base plate (5 cases); (2) the absorption of cranial bones in both the internal and external plates (24 cases); (3) (3 cases); (4) skull base sclerosis and absorption co-exist (5 cases). Recurrent tumor destruction in skull base structure is the largest sphenoid wing (36 cases). CT showed lesions invade the intracranial of a total of 24 cases, involving the intracranial structures of the cavernous sinus (16 sides), the temporal lobe (15 sides) and the pituitary gland (1 case). Conclusion The intracranial invasion demonstrated by CT is closely related to the above-mentioned mode of destruction of the middle skull base. CT examination can help clinical evaluation of maxillofacial recurrent tumor invasion of the skull base.