Despite being second only to the adrenal gland in terms of relative vascular perfusion, the thyroid gland is a rare site of metastatic disease; but when thyroid metastases occur, long term survival has been reported to be dismal. Metastases to the thyroid are uncommon, but the number of cases seems to have increased in recent years. This increase may be related to more frequent use of fine needle aspiration biopsy (FNAB) in suspected cases. In clinical papers, the incidence of metastases to thyroid is low and, according to various sources, amounts to 2-3% of all malignant tumors of the thyroid. Most commonly the primary tumor is located in the breast, bronchi, GIT (the colon, esophagus, or stomach) and kidney. Usually metastatic thyroid disease is identified upon autopsy, and only in sporadic cases. We present a case of breast Adenocarcinoma metastases to thyroid which was diagnosed on FNAC.