Flexible endoscopy above the upper esophageal sphincter

Pavel Kominek, Karol Zeleník, Ivana Mikoviny Kajzrlíková, Michal Hanousek, Ondrej Urban, Josef Chalupa & Petr Vitek
Introduction: Laryngohypopharyngeal tumors are frequently diagnosed at advanced stage. The advanced methods (Lugol’s solution chromoendoscopy or methylene blue contact endoscopy, autofluorescence or narrow band imaging) can not be always used in the hypoharynx/larynx or they are not widely[for full text, please go to the a.m. URL]