Zhang X, et al. - Authors gauged the influence of local anatomic factors on frontal neo-ostium (FNO) after a Draf 3 procedure by radiological measurements on imaging software. They also evaluated the other predictive factors of FNO restenosis. For the contour area of the FNO 1 year postoperatively, both FOAPMIN and EOS were the independent predictors. The measurements of the frontal sinus anatomic dimensions could help in the preoperative identification of the patients with a higher risk of developing frontal ostium restenosis.