A videofluoroscopic study comparing severe swallowing disorders in patients treated surgically or with radiation for oropharyngeal cancer.

The aim of this study was to analyze the causal mechanisms of severe swallowing disorders after the treatment of oropharyngeal cancer. Twenty-six patients with severe swallowing disorders at ≥12 months after treatment for oropharyngeal cancer were analyzed retrospectively using videofluoroscopy. Fourteen patients (54%) had been treated with surgery (±postoperative radiotherapy), while 12 patients (46%) had been treated with (chemo)radiotherapy. Videofluoroscopy analysis showed a localized alteration in the surgical excision area resulting in impaired tongue root retraction in the surgical group (P=0.012), while general impairment of the pharyngeal, laryngeal, and upper oesophagus sphincter was found in the non-surgical group. Aspirations in the surgical group most often occurred after swallowing, while in the non-surgical group, they occurred during and after swallowing (P=0.039). This analysis by videofluoroscopy provides important insights into the mechanisms giving rise to swallowing disorders after the treatment of oropharyngeal cancer.