Stage IVB Oral Cavity Cancer AJCC v6 and v7

**Semantic type:** Neoplastic Process

**Definition:** Stage IVB includes: (Any T, N3, M0); (T4b, Any N, M0). T4b: Oral cavity cancer with very advanced local disease. Tumor invades masticator space, pterygoid plates, or skull base and/or encases internal carotid artery. N3: Metastasis in a lymph node more than 6 cm in greatest dimension. M0: No distant metastasis. (AJCC 7th ed.)

**Synonyms:** - Stage IVB Carcinoma of Mouth - Stage IVB Carcinoma of Oral Cavity - Stage IVB Carcinoma of the Mouth - Stage IVB Carcinoma of the Oral Cavity - Stage IVB Mouth Carcinoma - Stage IVB Oral Cavity Cancer - Stage IVB Oral Cavity Cancer - Stage IVB Oral Cavity Cancer AJCC v6 - Stage IVB Oral Cavity Cancer AJCC v7 - Stage IVB Oral Cavity Carcinoma