A Comparative Study of CT Scan and Nasal Endoscopic Findings of Lateral Wall of Nose, in Headache of Rhinogenic Origin.

Headache disorders are rated among the ten most disabling conditions worldwide. Contact points like septal spur, septal deviation, concha bullosa and bulla ethmoidalis can cause rhinogenic headache (RH). Diagnostic nasal endoscopy (DNE) is an essential part of evaluation of sinonasal disease and is the key to understanding anatomical variations. As compared to CT paranasal sinus (CT PNS), DNE is cheaper and has wider availability, being part of the basic training of present ENT curriculum. We conducted a prospective observational study from September 2018 to June 2020 on 202 patients who were diagnosed to have RH. The aim of this study was to the define the role of DNE as the primary examination for early and accurate diagnosis of rhinogenic headache as compared to CT PNS. RH patients were evaluated with DNE followed by CT PNS. Evaluation of the findings of anatomical variations of lateral wall of nose on DNE and CT PNS was done. In our study the most common anatomic variations in order of frequency in both DNE and CT PNS was deviated nasal septum, impacting spur and unilateral concha bullosa. The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of DNE for the various anatomical variations was statistically better than CT PNS findings. We conclude that DNE is a better than CT PNS as a diagnostic technique to detect various anatomical variations, thus initiating early management of RH.