We report herein the case of a 43 year-old man who was operated 1998 of left colectomy and hepatic resection for colic adenocarcinoma metastasized in the liver. He suffers of multinodular goiter from some years; was admitted to our hospital with a 2-month history of enlargement of goiter and appearance of a new nodule. Physical and imaging examinations disclosed a new nodules in the thyroid. Was operated of total thyroidectomia and lymphoadenectomia cervical in the December 2002. Hystologic examinations revealed adenocarcinoma which was consistent with a diagnosis of metastases from the primary colon adenocarcinoma to the thyroid. The rarity, diagnosis, and prognosis of thyroid metastasis from colon carcinoma are discussed.