鞍膈的解剖特点及其临床意义

Abstract

Abstract:

Objective　To evaluate the anatomic characteristics of diaphragma sellae and its surrounding structures and discuss its clinical implications. 　Method　Fifteen heads of adult cadavers were observed and measured under the operative microscopy.　Result 　The midpoint of the optic chiasm (OC) was located on the midline in 66.7% (10 cases) and at the left and right sides of the sella turcica in 20%(3 cases) and 13.3%(2 cases), respectively. The foramen of diaphragma sellae (FDS) was completely covered by OC in 73.4%(11 cases), and was partially covered in 26.6%(4 cases). The position of FDS relative to OC was situated in the midline in 66.7 %(10 cases), in the left side in 26.7%(4 cases) and in the right side in 6.6% (1 case). Diaphragm sellae appeared concave in 80% (12 cases), convex in 13.3%(2 cases) and flat in 6.7%(1 case) when viewed from above. The average of anteroposterior diameter of FDS was 6.59 mm (range, 2.20 ~ 12.10 mm ) and the average transverse diameter was 7.32mm (range, 3.10 ~ 13.40 mm). we classified the diaphragm sellae into three types according to the FDS diameters variations: constricted type in 13.3%(2 cases); normal type in 73.4% (11 cases); and enlarged type in 13.3%(2 cases). Pituitary stalk was sited in front of dorsum sellae in 53.3% (8 cases), in the middle part in 40% (6 cases) and in the back of tuberculum sellae in 6.7% (1 case).　Conclusion The variation in the diameter of FDS could exert influence on the growth pattern of pituitary adenomas and the detailed anatomic knowledge of diaphragma sellae and its ambient structures is helpful in improving the quality of operation in the sellar region.

Key words: Diaphragma sellae, Optic chiasm, Pituitary stalk, Applied anatomy

CLC Number:

R323.1

LIANG Jin, QI Song-Chao, FAN Dun, DAN Jin, LIU Yun-Chao, YA Xiao-Rong. Anatomic features of diaphragma sellae and its clinic implications[J]. Chinese Journal Of Clinical Anatomy, 2013, 31(2): 123-126.

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Anatomic features of diaphragma sellae and its clinic implications

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