Abstract
In France, colorectal cancer is the third most common cancer in males and the second most common cancer in females. Thyroid metastasis from CRC is rare. The incidence of metastasis to the thyroid gland in autopsy series varies from 4% to 9%, while in clinical series the prevalence of intra-thyroid metastasis is not more than 1%. We present a case of a fifty years female patient who presented a right neck pain. Clinical and imaging examinations found an isolated right thyroid metastasis five years after the initial diagnosis of colon cancer. The thyroid metastasis was surgically resected and had adjuvant chemoradiotherapy was delivered. All patients with history of malignancy with thyroid nodule should be investigated for secondary deposits even after many years of cancer treatment. Fine nodule aspiration is a sensitive method of diagnoses. Surgical resection followed by radiation and chemotherapy should be proposed in a curative intent. Radiotherapy alone should be considered for palliation goal.