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

Stage	Tumor location
TX	The main (primary) tumor cannot be assessed; information not known
T0	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

T categories for iris melanoma:

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: The 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