[Effectiveness of Lenvatinib for Thyroid Cancer with Lung Metastases - Report of a Case].

A 73-year-old woman visited our hospital 1 year 4 months ago because of multiple lung masses that were incidentally detected on CT. We subsequently conducted a whole body examination. Ultrasonography revealed multiple masses in her thyroid. We performed fine needle aspiration biopsy cytology(ABC), and the cytological diagnosis was papillary carcinoma. Total thyroidectomy and modified radical neck dissection were performed. Two months after the operation, cervical lymph nodes were enlarged, and she received I -131 radioisotope therapy. However, the lung masses became enlarged. Five months after operation, she was stared on lenvatinib therapy. The lung lesions did not progress during the 10 months after starting this therapy. In this case, lenvatinib was effective against metastatic thyroid cancer.