Collision tumors of the thyroid gland are a rare entity. Primary squamous cell carcinoma of the thyroid (PSCCT) is a malignant epithelial tumor, composed entirely of cells with squamous differentiation and accounting for less than 1% of all malignancies of the thyroid gland. PSCCT arises from other thyroid diseases such as Hashimoto’s thyroiditis, tall cell variant papillary carcinoma, follicular carcinoma, and anaplastic carcinoma1. We describe a patient with the combination of a well-differentiated squamous cell carcinoma and follicular carcinoma of the thyroid.