The Authors of this study present a case of a 13-month old child subjected to surgical intervention for a cervical thymic cyst. The origin of lesions in children is usually associated with remnants from the development of the fetal thymus gland. When the tumor attains significant size, especially in the presence of clinical symptoms, such as respiratory disturbances and problems with feeding, surgical management is required.In spite of the rarity of thymic cysts, it should be considered in cases of differential diagnosis for neck tumors in children. Proper diagnosis is usually possible after the histopathological evaluation of removed tissues. The cervical approach enables removal of the entire lesion, even if partially localized in the thoracic cavity.