Stage II includes: (T2, N0, M0); (T3, N0, M0). T2: Tumor more than 2 cm but not more than 4 cm in greatest dimension, limited to the thyroid gland. T3: Tumor more than 4 cm in greatest dimension and limited to the thyroid gland, or tumor of any size with minimal extrathyroid extension (e.g., extension to sternothyroid muscle or perithyroid soft tissues). N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 7th ed.) [from NCI]