Complete Sella Turcica Bridges Prevalence and Dimensions

Abstract

Interclinoid ligaments which connect the anterior and posterior clinoid processes comprise a group of intrinsic ligaments of sphenoid bone. The complete sella turcica bridge corresponds to the complete ossification of the interclinoid ligaments. 112 dry human adult skull bones were studied for presence of ossified interclinoid ligaments. Nine skulls (8.04%) showed sella turcica bridges, out of which six were unilateral and three bilateral. The average length of the bridge was 11.67mm. The average width and thickness at the anterior clinoid process was 6.33mm and 4.33mm ; atthe middle of the bridge 3.08mm and 2.66mm; and atthe posterior clinoid process, 4.91 mm and 3.66mm, respectively. Anomalies of sellar region are not very rare and may pose difficulties in interpretation of Magnetic Resonance Imaging or Computed Tomographyforthe radiologist. Thesefindings would also guide the neurosurgeons in planning neurosurgical procedures involving the sellar region.

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