Salvage treatment
The RFA group had 18 recurrences (28%). One of these patients was lost to follow-up, and the other patients received RFA endoscopic partial laryngectomy (n = 8), external partial laryngectomy (n = 5), or total laryngectomy (n= 4). After retreatment, the larynx preservation rate was 76.5% (13 of 17). Recurrences (2 of 28) of the open surgery group were treated by total laryngectomy (n = 2).