Metastatic Malignant Neoplasm in the Thyroid Gland

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm either directly extending to the thyroid gland from adjacent structures (e.g. pharynx, larynx, esophagus, cervical lymph nodes), or spreading to the thyroid gland from distant anatomic sites, most frequently kidney, lung, uterus, breast, and skin. The majority of cases are carcinomas, lymphomas, and melanomas.

**Synonyms:** - Metastasis to the Thyroid - Metastasis to the Thyroid Gland - Metastatic Malignant Neoplasm to the Thyroid - Metastatic Malignant Neoplasm to the Thyroid Gland - Metastatic Malignant Tumor to the Thyroid - Metastatic Malignant Tumor to the Thyroid Gland - Metastatic Neoplasm to the Thyroid - Metastatic Neoplasm to the Thyroid Gland - Metastatic Tumor to the Thyroid - Metastatic Tumor to the Thyroid Gland - Secondary Malignant Neoplasm to the Thyroid - Secondary Malignant Neoplasm to the Thyroid Gland - Secondary Malignant Tumor to the Thyroid - Secondary Malignant Tumor to the Thyroid Gland