Abstract
Background: Differentiated thyroid carcinoma (DTC) is the most common malignant tumor of the thyroid gland and causes local and/or distant metastases. Differentiated thyroid carcinoma (DTC) is the most common form, representing more than 90% of all thyroid cancers and derives from the follicular cells of the thyroid. Choroidal metastasis from DTC is extremely rare. Only a few cases have been reported in literature. Case Summary: We report the case of a 43-year-old man with differentiated thyroid cancer. He underwent a total thyroidectomy plus a right latero-cervical lymphoadenectomy. Histological examination revealed a 7 mm papillary thyroid cancer, pT3N1b. Firstly treated with locoregional treatment. In February 2012 computer tomography (CT) scan and WBS showed a progression of disease with bilateral lung lesions, bilateral multiple jugular carotid lymphnodes and bone metastases localized in the IV thoracic rib. After progression disease he was treated with Lenvatinib 24 mg daily. Symptomatic choroid metastases were diagnosed 4 years after initial diagnosis, and were treated with external-beam radiation. Although treatment reduced local masses, a rapid progression of multiple metastatic lesions was observed. Conclusion: In our case, progression free survival with lenvatinib was in agreement with data of SELECT trial, this is a rare case of choroidal metastases from DTC.
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