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

<div>Relationship between the floor of the frontal sinus, the posterior wall of the frontal sinus, and the first olfactory fibre in sagittal computed tomography. (a) Relationship between the first olfactory fibre and the posterior wall of the frontal sinus. (b, c) Relationship between the skull base-frontal sinus angle (SBA) and the posterior wall of the frontal sinus.</div>

Case Reports in Otolaryngology

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Figure 4: Frontal Sinus “Hump”: An Anatomical Risk Factor for Anterior Skull Base Injury in the Endoscopic Modified Lothrop Approach (Outside-In Frontal Drill-Out) 

Figure 4 | Frontal Sinus “Hump”: An Anatomical Risk Factor for Anterior Skull Base Injury in the Endoscopic Modified Lothrop Approach (Outside-In Frontal Drill-Out) 