CO

To evaluate the efficacy of COThis is a cohort retrospective study. Thyroid function and cervical ultrasonography examinations were performed before operation. Enhanced magnetic resonance imaging (MRI) was performed on patients with a repeated infection (≥2 times) and/or if they had a prior open surgery. Patients were divided into two groups: the8-year-old group and the ≥8-year-old group. The differences in the number of cauterization procedures between the two age groups and between the initial treatment and the retreatment groups were analyzed.COCOTreatment Study.Level III.