On November 14^th, 2014 Beijing ENT clinical difficult cases seminar was held in PUTH. The seminar has attracted ENT experts and scholars all around country, as well as 170 ENT doctors from 30 hospitals in north China. Yan Yanda, Zhu Li, Ma Furong from ETH Department shared their report. (Translated by Ye Xin, Proof by Ding Xinyue)