CT冠状位扫描对诊断鼻咽癌侵犯颅底的价值

目的　探讨CT冠状位扫描 (简称“冠扫”)对诊断鼻咽癌 (NPC)侵犯颅底的价值。方法　将经病理证实的 186例NPC之CT轴位扫描 (轴扫 )与冠扫颅底情况进行回顾性对照分析。结果　 186例NPC中 ,有 98例 (占 5 2 7% )经轴扫与冠扫均未见颅底侵犯 ;5例 (2 7% )轴扫未见颅底异常而经冠扫发现其受侵 ;2 5例 (13 4 % )轴扫可疑颅底受侵而经冠扫肯定侵犯 9例 ,排除 16例 ;2 3例 (12 3% )轴扫见明显颅底侵犯而经冠扫见范围更广、程度更深的侵犯 ;35例 (18 8% )轴扫与冠扫颅底受侵情况一致。结论　CT冠扫对诊断NPC有无颅底侵犯以及侵犯部位、范围和程度有重要价值 ,只有将轴、冠扫紧密结合才能得出全面、客观的结论

Value of CT Coronal Scan in Diagnosis of Invasion of Skull Base by Nasopharyngeal Carcinoma

Objective To evaluate the value of CT coronal scan in diagnosis of invasion of skull base by Nasopharyngeal carcinoma (NPC). Methods The status of the skull base of 186 cases with NPC showed by CT coronal and axial scan was analyzed retrospectively, these cases were proved by pathology. Results In the 186 cases of NPC, the invasion of the base of skull wasn't revealed in 98 cases (52.7%) by CT coronal and axial scan. CT coronal scan showed bone invasion in 5 cases (2.7%), while the invasion wasn't recognized by axial scan. By CT coronal scan, the invasion of skull base was confirmed in 9 and excluded in 16 of 25 cases (13.4%) in which the invasion was uncertain by axial scan. Wider and deeper invasion was recognized in 23 cases (12.3%) by coronal scan, though obvious invasion had been diagnosed after axial scan. Accordant invasion was displayed in 35 cases (18.8%) by CT coronal and axial scan. Conclusion CT coronal scan is valuable for demonstrating whether the base of skull is invaded or not and the position, range and degree of the invasion. Only by combining CT axial with coronal scan a complete and objective conclusion can be drawn.