Indicators of a Reduced Intercarotid Artery Distance in XXXX Undergoing Endoscopic Transsphenoidal Surgery.

@entity1 @entity5529 @entity5 @entity4611 @entity1653 @entity1317 @entity652
Objective   To identify clinicopathologic factors associated with a reduced @entity5529 ( @entity5529 ) and subgroups at risk for internal carotid @entity1317 during transsphenoidal surgery. Design   A retrospective case-control study. Setting   This study was conducted at the McGill University Health Centre, a university-affiliated tertiary care center. @entity1   @entity1 with a sellar or parasellar @entity5 and nontumor controls were included in the study. Main Outcome Measures   The smallest distance between the internal carotid arteries at the clival, cavernous, and paraclinoid segments on coronal magnetic resonance imaging was measured. Demographic profiles, cephalometric measurements, @entity5 dimensions, and sphenoid configuration were assessed as potential determinants of the @entity5529 . Results   A total of 212 cases and 34 controls were analyzed. Widening of the @entity5529 at the three segments of the internal carotid arteries was found in @entity1 with @entity4611 (p   <   0.01). @entity1 with a growth hormone-secreting @entity652 had a markedly reduced @entity5529 at the clivus compared with controls (1.59 cm versus 1.77 cm; p   =   0.02; 95% confidence interval [CI], 0.03-0.32). The paraclinoid @entity5529 was reduced in @entity1 with an @entity1653 (1.24 cm versus 1.33 cm; p   =   0.04; 95% CI, 0.01-0.45). Conclusion   Identifying clinicopathologic factors affecting the @entity5529 can help surgeons recognize constraints to endoscopic access of the skull base and avoid inadvertent @entity1317 .
