Stage IVA Thyroid Gland Anaplastic Carcinoma AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage IVA includes: T1-T3a, N0/NX, M0. T1: Tumor measuring 2 cm or less in greatest dimension limited to the thyroid. T2: Tumor measuring more than 2 cm but 4 cm or less in greatest dimension limited to the thyroid. T3a: Tumor measuring more than 4 cm in greatest dimension limited to the thyroid. N0: No evidence of locoregional lymph node metastasis. NX: Regional lymph nodes cannot be assessed. M0: No distant metastasis. (from AJCC 8th Ed.)

**Synonyms:** - Stage IVA Thyroid Gland Undifferentiated (Anaplastic) Carcinoma AJCC v8 - Undifferentiated (Anaplastic) Stage IVA Thyroid Gland Cancer