Stage IIIB intraocular melanoma of the ciliary body and choroid

Stage III is divided into stages IIIA, IIIB, and IIIC. In stage IIIB, the tumor (1) is size category 3 (15.1 to 18 millimeters wide and 3.1 to 6 millimeters thick; or 12.1 to 18 millimeters wide and 6.1 to 9 millimeters thick; or not more than 18 millimeters wide and 9.1 to 12 millimeters thick; or not more than 15 millimeters wide and 12.1 to 15 millimeters thick) and has spread through the sclera to the outside of the eyeball. The part of the tumor outside the eyeball is not more than 5 millimeters thick. The tumor has spread to the ciliary body; or (2) is size category 4 (more than 18 millimeters wide and may be any thickness; or 15.1 to 18 millimeters wide and more than 12 millimeters thick; or not more than 15 millimeters wide and more than 15 millimeters thick) and has spread to the ciliary body; or (3) is size category 4 and has spread through the sclera to the outside of the eyeball. The part of the tumor outside the eyeball is not more than 5 millimeters thick. The tumor has not spread to the ciliary body.