Frontal Sinus Morphometry in Relation to Surgically Relevant Landmarks in the Middle East Population: Can We Globalize?

Abstract The frontal bone is frequently approached during neurosurgical procedures. Feared complications of such surgeries include cerebrospinal fluid leak, amongst others, and frequently result from a breach of the frontal sinus. For this reason, the sinus should be avoided when possible. The supraorbital notch is a reliable and easily identifiable surgical landmark and its relation to the frontal sinus has been previously studied. However, the frontal sinus shows significant variability in size and shape between populations. In the present study, we investigate the frontal sinus dimension and its relation to the supraorbital notch in the Middle Eastern population. The analysis of a set of CT scans reveals a significant variation in size between genders, and we subsequently provide neurosurgeons in the region with population targeted, gender-specific risk maps. We finally conclude that a 2cm margin rostral and lateral to the supraorbital notch is safest.