The "frontal peak" sign: A potential new indication of open approach in frontal sinus mucoceles with posterior table erosion. A retrospective chart review of thirty‐seven patients. (10th July 2017) - Béquignon, E.; Blancal, J.‐P.; Guichard, J.‐P.; Ruellan, K.; Kania, R.; Sauvaget, E.; Bresson, D.; Herman, P.; Verillaud, B.