Stage IVB Thyroid Gland Medullary Carcinoma AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage IVB includes: T4b, Any N, M0. T4b: Very advanced disease; tumor of any size with extension towards the spine or into nearby large blood vessels, invading the prevertebral fascia, or encasing the carotid artery or mediastinal vessels. M0: No distant metastasis. (from AJCC 8th Ed.)

**Synonyms:** - Stage IVB Thyroid Gland Medullary Cancer