Stage IIA includes: (T1b-d, N0, M0); (T2a, N0, M0). T1b: Tumor size category 1 with ciliary body involvement. T1c: Tumor size category 1 without ciliary body involvement but with extraocular extension less than or equal to 5 mm in largest diameter. T1d: Tumor size category 1 with ciliary body involvement and extraocular extension less than or equal to 5 mm in largest diameter. T2a: Tumor size category 2 without ciliary body involvement and extraocular extension. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 8th ed.) [from NCI]