STROBOSCOPIC OBSERVATION OF THE LARYNX AFTER RADIATION IN PATIENTS WITH T1 GLOTTIC CARCINOMA

We studied laryngeal video stroboscopy (LVS) system for evaluation of patients with glottic carcinoma (T1N0M0) before and after radiotherapy . There were 10 patients with T1 glottic squamous cell carcinoma (9 me n and 1 woman) who received radiotherapy at the Hitachi General Hospit al. We performed LVS before and after radiotherapy. The presence or ab sence of mucosal waves (MW) was particularly noted. No MW were present before radiotherapy but at 1-6 months after, MW gradually appeared. O ne year after radiotherapy all patients showed MW on LVS. In patients with glottic carcinoma MW recovered after radiation therapy. LVS may b e useful for the clinical follow-up of post-radiation patients for ear ly detection of recurrence of glottic carcinoma.