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Aim: This study aimed to radiographically evaluate the diameters of the nasolacrimal duct (NLC) and infraorbital foramen (IOF) in patients operated on for antrochoanal polyps (ACP) and to investigate the association of these structures with the location of the polyp. Materials and Methods: The transverse and anteroposterior diameters of NLC and IOF were measured from paranasal CT images of 40 patients who underwent functional endoscopic sinus surgery with a diagnosis of ACP between January 1, 2020, and January 15, 2025. Patients were classified according to the location of the polyp, its origin, and the status of sinus ventilation. Results: While there was generally no significant difference in NLC diameters, in some subgroups the transverse diameters were found to be significantly larger on the normal side than on the pathological side. On the pathological side, a clear and significant narrowing of the IOF diameter was observed in all groups. Conclusion: ACP causes morphological changes, particularly at the IOF, and the narrowing of this structure suggests bone remodeling. The effect on the NLC is more limited. A preliminary assessment of these anatomical structures during surgery planning is important to prevent possible complications.
Atik et al. (Fri,) studied this question.