Endoscopic surgery for malignant sinonasal tumors

Mu-Kuan Chen, Yao-Lung Tsai & Chuang-Chuan Chang
Introduction Malignant sinonasal tumors are uncommon, accounting for less than 1% of all malignancies and 3% of those of the head and neck. The initial presenting symptoms are usually nonspecific, with the results that the majority of these tumors have often reached an advanced stage by[for full text, please go to the a.m. URL]