Uveal melanoma staging

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]

Staging

T categories for iris melanoma:

Stage	Tumor location
TX	The main (primary) tumor cannot be assessed; information not known
T0	No evidence of a primary tumor
T1	Tumor is only in the iris
T1a	The tumor is only in the iris and touches 1/4 or less of the iris
T1b	The tumor is only in the iris and touches more than 1/4 of the iris
T1c	The tumor is only in the iris and is causing an increase in the eye pressure (glaucoma)
T2	Tumor has grown into the ciliary body or choroid (or both)
T2a	Tumor has grown into the ciliary body and/or choroid and is causing glaucoma
T3	Tumor has grown into the ciliary body and/or choroid and into the sclera
T3a	Tumor has grown into the ciliary body and/or choroid and into the sclera and is causing glaucoma
T4	Tumor extends outside the eyeball
T4a	TThe part of the tumor that is outside the eyeball is 5 millimeters (about 1/5 of an inch) or less across in size
T4b	The part of the tumor that is outside the eyeball is greater than 5 millimeters (about 1/5 of an inch) in size