目的以断层解剖学为依据,研究正常成人M ecke l腔(M C)硬膜壁及其内部结构的CT和M R I表现。方法40例M C区正常成人,其中20例行横轴位和冠状位SE T1W I、FSE T2W I及SE T1W I-C+;另20例同时行冠状位和横轴位CT和CT-C+。分析M C壁及其内...目的以断层解剖学为依据,研究正常成人M ecke l腔(M C)硬膜壁及其内部结构的CT和M R I表现。方法40例M C区正常成人,其中20例行横轴位和冠状位SE T1W I、FSE T2W I及SE T1W I-C+;另20例同时行冠状位和横轴位CT和CT-C+。分析M C壁及其内部结构的CT和M R I表现、显示率。结果①外侧壁CT和M R I显示率高,前壁、内侧壁、上壁和后壁M R I较CT显示率高,CT和M R I平扫呈等密度/信号,增强扫描明显强化,下壁CT和M R I均不能显示;②三叉神经节位于M C前外下部,冠状位较横轴位显示佳,增强扫描可强化;③三叉神经节周围静脉丛CT和M R I平扫不能显示,增强扫描呈高密度/高信号;④三叉神经池在CT上呈低密度,在M R I上呈长T1长T2信号;⑤神经纤维在FSE T2W I上呈点状或短条状等信号。结论本文提供了国内正常成人M C的CT和M R I表现,可为临床相关诊断和治疗提供理论依据;M R I在显示M C结构和形态方面具有优势。展开更多
Objective To provide a new approach for the treatment of tumor in Meckel’s cave, by dissecting adjacent structures of the nasal cavity-maxillary sinus-pterygopalatine fossa-Meckel’s cave approach. Methods Fifteen ad...Objective To provide a new approach for the treatment of tumor in Meckel’s cave, by dissecting adjacent structures of the nasal cavity-maxillary sinus-pterygopalatine fossa-Meckel’s cave approach. Methods Fifteen adult cadaver heads （30 sides） were dissected and the correlated anatomic landmarks were observed, measured and analyzed in an operative route. Results The approach was divided into 3 steps： entering the maxillary sinus, the later pterygopalatine fossa and the final Meckel’s cave. Safe access to Meckel’s cave could be achieved by tracing the vidian neurovascular bundles and dissecting the quadrangular space （QS）. The distances from the nasal columella to the apertura maxillaries, the sphenopalatine foramen, and the anterior foramen of the pterygoid canal were （44.08±2.61） mm, （64.83±2.42） mm, and （70.43±2.94） mm, respectively. The angles between the horizontal plate of the palatine bone and the link from nasal columella to apertura maxillaries, between the horizontal plate of the palatine bone and the link from nasal columella to sphenopalatine foramen were （38.10±2.46）° and （26.15±2.26）°, respectively. Conclusion The endoscopic approach of transnasal maxillary sinus-pterygopalatine fossa-Meckel’s cave （ENMPA） is a safe and direct way to access Meckel＇s cave, and could be employed for the treatment of tumor in Meckel’s cave.展开更多
文摘目的以断层解剖学为依据,研究正常成人M ecke l腔(M C)硬膜壁及其内部结构的CT和M R I表现。方法40例M C区正常成人,其中20例行横轴位和冠状位SE T1W I、FSE T2W I及SE T1W I-C+;另20例同时行冠状位和横轴位CT和CT-C+。分析M C壁及其内部结构的CT和M R I表现、显示率。结果①外侧壁CT和M R I显示率高,前壁、内侧壁、上壁和后壁M R I较CT显示率高,CT和M R I平扫呈等密度/信号,增强扫描明显强化,下壁CT和M R I均不能显示;②三叉神经节位于M C前外下部,冠状位较横轴位显示佳,增强扫描可强化;③三叉神经节周围静脉丛CT和M R I平扫不能显示,增强扫描呈高密度/高信号;④三叉神经池在CT上呈低密度,在M R I上呈长T1长T2信号;⑤神经纤维在FSE T2W I上呈点状或短条状等信号。结论本文提供了国内正常成人M C的CT和M R I表现,可为临床相关诊断和治疗提供理论依据;M R I在显示M C结构和形态方面具有优势。
基金supported by the National key Technology R & D Program during the Eleventh Five-Year Plan Period of China (No. 2006BAI01A12)
文摘Objective To provide a new approach for the treatment of tumor in Meckel’s cave, by dissecting adjacent structures of the nasal cavity-maxillary sinus-pterygopalatine fossa-Meckel’s cave approach. Methods Fifteen adult cadaver heads （30 sides） were dissected and the correlated anatomic landmarks were observed, measured and analyzed in an operative route. Results The approach was divided into 3 steps： entering the maxillary sinus, the later pterygopalatine fossa and the final Meckel’s cave. Safe access to Meckel’s cave could be achieved by tracing the vidian neurovascular bundles and dissecting the quadrangular space （QS）. The distances from the nasal columella to the apertura maxillaries, the sphenopalatine foramen, and the anterior foramen of the pterygoid canal were （44.08±2.61） mm, （64.83±2.42） mm, and （70.43±2.94） mm, respectively. The angles between the horizontal plate of the palatine bone and the link from nasal columella to apertura maxillaries, between the horizontal plate of the palatine bone and the link from nasal columella to sphenopalatine foramen were （38.10±2.46）° and （26.15±2.26）°, respectively. Conclusion The endoscopic approach of transnasal maxillary sinus-pterygopalatine fossa-Meckel’s cave （ENMPA） is a safe and direct way to access Meckel＇s cave, and could be employed for the treatment of tumor in Meckel’s cave.
