Case Study and Case Report 2023; 13(4): 35 – 39.

Demir S, Yurab R. CASTLE Thyroid Tumor: A Case Report. Case Study and Case Report 2023; 13(4): 35 – 39. ABSTRACT A rare tumor of the thyroid gland, known as thymus-like differentiated carcinoma, bears structural resemblance to thymic tissue. The prognosis for this type of tumor is generally positive. While radiotherapy has proven effective as a localized treatment, instances of distant recurrence have been reported. In order to lower the risk of recurrence, it has been recommended to incorporate chemotherapy into the treatment regimen. In this case report, we present the successful treatment of a patient with a large tumor and extrathyroidal extension. The patient received surgery, radiotherapy, and cisplatin, which resulted in manageable side effects. Three years later, the patient remains disease-free both locally and in distant sites. Key words: CASTLE, thyroid, tumor