We hypothesize that T+A may be less efficacious in obese adolescents because of earlier onset of puberty imparting more adult characteristics. We further hypothesize that the efficacy of T+A will correlate more closely with Tanner staging than with chronologic age because of the earlier onset of sexual maturation associated with obesity. Thus, we propose to study the efficacy of T+A in the treatment of sleep apnea in obese adolescents using polysomnography to quantify the severity of OSAS before and after T+A. It is anticipated that results from this preliminary study will be used to form the basis for studies comparing efficacy of adenotonsillectomy against the use of CPAP in this population.