Tonsillectomy vs. Tonsillotomy in Adults With Obstructive Sleep Apnea

Inclusion Criteria: * Age \> 18 years * Tonsil size 2, 3, or 4 (Friedman tonsil scale) * Confirmed OSA with sleep analysis not older than a year either CRM or PSG * ASA 1 or 2 * BMI \< 35 kg/m2 Exclusion Criteria: Children age \< 18 years * Previous pharyngeal surgery such as previous tonsillotomy, tonsillectomy or palatal surgery * Epileptic disease or severe neurological comorbidity. * ASA 3, or 4. * Central sleep apnea * Previous thrombotic disease. * Currently treated with sleep medications * No collapse of oropharyngeal lateral wall during DISE * Dropout of study, lack of sleep analysis or lack of postoperative DISE.