Article 1 Humans 1 Longitudinal Studies 1 Lymph Nodes 1 Lymphatic Metastasis 1 Morbidity 1 Mouth Neoplasms 1 Mouth neoplasms 1 Neck Dissection 1 Neck dissection 1 Neoplasm Staging 1 Quality of Life 1 Quality of life 1 Sentinel Lymph Node Biopsy 1 Sentinel lymph node biopsy Shoulder 1 Shoulder function 1 adult 1 cancer staging 1 cohort analysis 1 comparative study 1 elective surgery 1 female 1 human 1 human tissue 1 longitudinal study 1 lymph node 1 lymph node metastasis 1 major clinical study 1 male 1