1Abstract Purpose: The present study aims to measure the post-surgical swallowing function in patients five years after operative treatment of tongue carcinoma.Patients and Methods: Using a retrospective cohort study design, the investigators enrolled post-surgical patients treated for tongue carcinomas in Hokkaido University Hospital. The primary outcome variable was the Oropharyngeal Swallow Efficiency (OPSE) determined by videoflluoroscopic evaluation and the OPSE at present was compared with that at discharge.Other variables included present nutritional status (Body Mass Index: BMI, Serum Albumin), dietary intake, self-rating of the present swallowing function, and the occurrence of pneumonia.Statistical analysis used the paired t-test and Spearman's rank correlation.Results: The swallowing function was assessed in 20 patients (11 males and 9 females) subjected to surgical treatment of tongue carcinomas; the median age was 70 years (range 56-90 years) at the present evaluation. The mean values of the liquid OPSE and paste OPSE at present were 26.6±21.2 and 21.9±22.5 respectively. The mean values of BMI and serum albumin at present were 22.2±3.4 and 4.5±0.3g/dl respectively. All patients had a full oral intake of foods, with a mean self-rated value of 6.4±2.5, an acceptable value as evaluated by the patients.Pneumonia requiring hospitalization had not occurred in these patients.Conclusions: Long-term follow-up of patients following operative treatment of tongue carcinomas demonstrate acceptable levels of oral function and nutritional status despite objective measures of poor swallowing efficiency assessed using a videofluoroscopy.