Thyroid metastases from colon cancer case report in a long term survivor.

Colon cancer usually has an hematogenous spread to liver and lung: rarely, or in the case of most advanced disease, also brain and bone can be involved. Thyroid metastasis is generally thought to be infrequent, breast and kidney cancer being the most frequent causes. Herein we present the case of a man affected by liver metastasis from colon cancer, who developed unusual metastasis to thyroid.