HypopharynxHypopharyngeal NeoplasmsLaryngeal NeoplasmsPharyngeal NeoplasmsLaryngectomyPharyngectomyPharyngeal DiseasesHead and Neck NeoplasmsLarynxCarcinoma, Squamous CellOropharyngeal NeoplasmsFree Tissue FlapsLaryngeal MucosaPharynxEsophageal Sphincter, UpperOropharynxNeck DissectionEpiglottisDeglutition DisordersOtorhinolaryngologic NeoplasmsPectoralis MusclesDeglutitionLaryngoscopyMouth NeoplasmsSurgical FlapsEsophagusRadiotherapy DosageReconstructive Surgical ProceduresCombined Modality TherapyRadiotherapy, Adjuvant