Materials and Methods
Study design: A Cross sectional retrospective study. The reporting guideline is for an observational study.
Setting: Otolaryngology and Pathology Departments.
Participants: Patients who were diagnosed with LSCC and their clinical and radiological neck lymph nodes status was N0 were included into our study while patients had irresectable tumors (T4b) or comorbidities interfering with surgery were excluded.