Collagen ii

Stage II includes: IIA (T1b-d, N0, M0); (T2a, N0, M0); IIB (T2b, N0, M0); (T3a, N0, M0). T1b: Iris: Tumor limited to the iris more than 3 clock hours in size. Ciliary body and choroid: Tumor size category 1 with ciliary body involvement. T1c: Iris: Tumor limited to the iris with secondary glaucoma. Ciliary body and choroid: Tumor size category 1 without ciliary body involvement but with extraocular extension less than or equal to 5 mm in diameter. T1d: Ciliary body and choroid: Tumor size category 1 with ciliary body involvement and extraocular extension less than or equal to 5 mm in diameter. T2a: Iris: Tumor confluent with or extending into the ciliary body, choroid, or both, with secondary glaucoma. Ciliary body and choroid: Tumor size category 2 without ciliary body involvement and extraocular extension. T2b: Ciliary body and choroid: Tumor size category 2 with ciliary body involvement. T3a: Iris: Tumor confluent with or extending into the ciliary body, choroid, or both, with sclera extension and secondary glaucoma. Ciliary body and choroid: Tumor size category 3 without ciliary body involvement and extraocular extension. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 7th ed.)