Stage II includes: IIA: (T2-3, N0, M0); IIB: (T4, N0, M0). T2: Maximum clinical tumor diameter more than 2 cm but equal to or less than 5 cm. T3: Maximum clinical tumor diameter more than 5 cm. T4: Primary tumor invades fascia, muscle, cartilage, or bone. N0: No regional lymph node metastasis detected on pathologic examination. M0: No distant metastasis detected on clinical and/or radiologic examination. (AJCC 8th ed.) [from NCI]