Anatomic study to posterior-middle cranial fossa via retrosigmoid keyhole approach
10.3760/cma.j.issn.1001-2036.2009.05.016
- VernacularTitle:乙状窦后锁孔入路对颅中后窝区的显微解剖
- Author:
Zhengyi LI
;
Wei SHI
;
Lanchun NI
;
Jian CHEN
- Publication Type:Journal Article
- Keywords:
Micro-anatomp;
Keyhole approach;
Suprameatal;
Postenor-middle cranial fossa
- From:
Chinese Journal of Microsurgery
2009;32(5):390-392,illust 7
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore and evaluate the micro-anatomic structure of posterior-middle cra nial fossa in the retrosigmoid keyhole approach for clinical application. Methods Ten formalin-fixed adult cadaver heads of 20 sides were used to apply the retrosigmoid keyhole approach to reach and observe the structure of posterior-middle cranial fossa.Results The retrosigmoid keyhole approach can reach petroclival region from post-lateral aspect and through this approach the lateral potion of cerebellar hemisphere、petrosal bone,CN Ⅴ,Ⅶ,Ⅷ,part of CN Ⅸ-Ⅻ,lateral potion of pons、vertebral artery and anterior inferior cerebellavar artery can be exposed cleady.Resecting part of supra-tubercle of IAM can enlarge the exposure of IAM and CN V.After cutting off the edge of tentorial part of CN Ⅳ and middle cranial fossa can be exposed.Conclusion Through retrosigmoid keyhole approach we can use the small but compatible bone hole to diminish the ineffective exposure of the cerebellum.Meanwhile the wound because of the approach and complication can be cut down.It's an effective,safe and convenience approach in clinical application to resect the tumor mainly located in posterior cranial fossa.
