Frontal Sinus “Hump”: An Anatomical Risk Factor for Anterior Skull Base Injury in the Endoscopic Modified Lothrop Approach (Outside-In Frontal Drill-Out)

<div>Computed tomography of the frontal sinus. (a) Axial section. The anteroposterior (AP) diameter of the right frontal sinus is 9.6 mm and that of the left frontal sinus is 5.9 mm. (b, c) Sagittal section of the right and left frontal sinuses. The skull base-frontal sinus angle (SBA) on the right frontal sinus is 126° and that of the left frontal sinus is 107°.</div>

Case Reports in Otolaryngology

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Figure 2: Frontal Sinus “Hump”: An Anatomical Risk Factor for Anterior Skull Base Injury in the Endoscopic Modified Lothrop Approach (Outside-In Frontal Drill-Out) 

Figure 2 | Frontal Sinus “Hump”: An Anatomical Risk Factor for Anterior Skull Base Injury in the Endoscopic Modified Lothrop Approach (Outside-In Frontal Drill-Out) 