**5. Treatment**

Surgery is the choice method for diagnosis and treatment of symptomatic thymic gland masses. Ectopic thymic lesions are usually treated by complete surgical resection even in the absence of evident malignancy. Some malignant transformations have been reported in cases with solid ectopic thymic tissue and thymoma in cervical ectopic thymus [31–33].

With the important role of the thymus gland in the immune system, surgeons should make sure about the presence of a mediastinal thymus before thymectomy [34]. Some authors have mentioned that benign thymic lesions can be treated by conservative management; however, a surgical procedure should be considered if further changes are noticed in further studies [29]. Thymic cysts should be completely resected as they contain no active thymic tissue.

*Thymus*
