A benign or malignant neoplasm affecting the thyroid gland. The disease is thyroid tumor (MONDO_0015074). Also known as: neoplasm of the thyroid, neoplasm of the thyroid gland, neoplasm of thyroid, neoplasm of thyroid gland, thyroid gland neoplasm, thyroid gland neoplasm (disease), thyroid gland tumor, thyroid gland tumour.