Stage II includes: Under 45 years: Any T, Any N, M1. 45 years and older: T2, N0, M0. T2: Tumor more than 2 cm but not more than 4 cm in greatest dimension, limited to the thyroid gland. N0: No regional lymph node metastasis. M1: Distant metastasis. M0: No evidence of distant metastasis. (from AJCC 7th Ed.) [from NCI]