Biomarkers, Tumor/metabolism; Carcinoma, Squamous Cell/mortality; Kangai-1 Protein/metabolism; Laryngeal Neoplasms/mortality; Multidrug Resistance-Associated Proteins/metabolism; Neoplasm Recurrence, Local/mortality; Tetraspanin 29/metabolism; Adult; Aged; Aged, 80 and over; Biomarkers, Tumor/genetics; Carcinoma, Squamous Cell/metabolism; Carcinoma, Squamous Cell/secondary; Case-Control Studies; Female; Follow-Up Studies; Humans; Immunoenzyme Techniques; Kangai-1 Protein/genetics; Laryngeal Neoplasms/metabolism; Laryngeal Neoplasms/pathology; Lymphatic Metastasis; Male; Middle Aged; Multidrug Resistance-Associated Proteins/genetics; Neoplasm Invasiveness; Neoplasm Recurrence, Local/metabolism; Neoplasm Recurrence, Local/pathology; Neoplasm Staging; Prognosis; RNA, Messenger/genetics; Real-Time Polymerase Chain Reaction; Reverse Transcriptase Polymerase Chain Reaction; Survival Rate; Tetraspanin 29/genetics