목적: Despite widespread use of antibiotics and surgical procedures for treating peritonsillar abscess (PTA), symptoms of severe inflammation such as pain and trismus during treatment result in patient dissatisfaction. The goal of this study was to perform a systematic review and meta-analysis of the efficacy of systemic steroids on the clinical course of PTA. 방법:Two reviewers independently searched the databases (MEDLINE, SCOPUS, and the Cochrane Database) from inception to December 2014. Studies comparing systemic administration of steroids (steroid group) with placebo (placebo group), where the outcomes of interest were pain, body temperature, hospitalization, and oral intake during the posttreatment period, were included. Baseline study characteristics, study quality data, numbers of patients in the steroid and control groups, and outcomes were extracted. Sufficient data for meta-analysis were retrieved for 3 trials with a total of 153 patients. 결과:Pain-related parameters (patient-reported scores and trismus), body temperature, and dysphagia during the first 24 hours after treatment were significantly improved in the steroid group compared with placebo group. The discharge rate during the first 5 days of the posttreatment period was significantly higher in the steroid group than the control group. However, although more patients in the steroid group returned to normal activities and dietary intake at 24 hours after treatment, the differences between the groups were not significant and disappeared after 48 hours. 결론: In the treatment of PTA, systemic administration of steroids with antibiotics could reduce pain-related symptoms, as well as provide a benefit with respect to the clinical course. However, further trials with well-designed research methodologies should be conducted to confirm our results.