蛛网膜袖套包裹垂体柄：解剖学和组织学研究。
The arachnoid sleeve enveloping the pituitary stalk: anatomical and histologic study.
机构信息
Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China.
出版信息
Neurosurgery. 2010 Mar;66(3):585-9. doi: 10.1227/01.NEU.0000365371.50165.06.
BACKGROUND
The arachnoid membrane in the suprasellar region may affect the growth pattern of sellar and suprasellar tumors however, the topographic relationships between the pituitary stalk and the surrounding arachnoid membranes remained unclear.
OBJECTIVE
The aim of this study was to evaluate the anatomical and histological characteristics of the arachnoid membranes.
METHODS
Microsurgical dissection and anatomical observation were performed in 16 formalin-fixed adult cadaver heads. In the other 5 adult cadaver heads, histologic sections of sellar-suprasellar specimens were studied under light microscopy.
RESULTS
An arachnoid sleeve enveloping the pituitary stalk of variable length presented in all specimens, which was formed by direct upward extension of the basal arachnoid membrane covering the diaphragma sellae. In the majority of specimens, the arachnoid sleeve was reinforced by the arachnoid trabeculae originating from the basal arachnoid membrane, the Liliequist membrane, and the medial carotid membrane.
CONCLUSION
The relationship between the pituitary stalk and the surrounding arachnoid membrane is important in evaluating the growth patterns of the sellar and suprasellar tumors, and their topographical relationships.
背景
鞍上区蛛网膜可能影响鞍内和鞍上肿瘤的生长方式，然而，垂体柄与周围蛛网膜之间的局部解剖关系尚不清楚。
目的
本研究旨在评估蛛网膜的解剖和组织学特征。
方法
对 16 例福尔马林固定的成人尸头进行显微解剖和解剖观察。在另外 5 例成人尸头中，对鞍上区标本进行组织学切片，在光镜下进行研究。
结果
所有标本均可见一条长短不一的蛛网膜袖套包裹垂体柄，由覆盖鞍隔的基底蛛网膜直接向上延伸形成。在大多数标本中，蛛网膜袖套由起源于基底蛛网膜、Liliequist 膜和颈内动脉膜的蛛网膜小梁加固。
结论
垂体柄与周围蛛网膜之间的关系对于评估鞍内和鞍上肿瘤的生长方式及其局部解剖关系非常重要。
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