Pediatric thymectomy: a study of national trends in demographics, short-term outcomes, and cost Abstract Background Thymectomy in pediatric patients is an effective treatment for myasthenia gravis (MG), thymic neoplasms, and other rarer pathologies. It is an uncommon procedure in children and studies have focused on small, single-institution cohorts. We sought to better characterize its use by utilizing a national database. Methods The Kids’ Inpatient Database was used to identify hospital discharge records of patients ≤ 20 years old who underwent thymectomy. A retrospective cross-sectional analysis for 2003, 2006, 2009, and 2012 was performed. Trends in patient characteristics, diagnosis, surgical approach, and short-term outcomes were analyzed. Risk factors were identified using univariate and multivariate analyses. Results There were 600 thymectomies identified. MG was the most common indication. Thoracoscopy is being used increasingly for all diagnoses except malignancy. The overall morbidity rate was 14.0%, with respiratory complications representing the largest group. No in-hospital deaths were identified. Private insurance was associated with shorter hospital stays and lower costs. Hispanic race was associated with more complications, longer stays, and higher costs. Thoracoscopic thymectomies had shorter stays than open procedures. Conclusion Thymectomy in the pediatric population is being performed safely, with low morbidity and no identified mortalities. Thoracoscopy results in reduced length of stay and is being used increasingly. Of note, socioeconomic and racial factors impact outcomes.