Summary of Changes
Iris
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T1 lesions have been divided into T1a, T1b, and T1c.
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T1a is denned as tumor limited to the iris not more than 3 clock hours in size.
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T1b is denned as tumor limited to the iris more than 3 clock hours in size.
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T1c is defined as tumor limited to the iris with melanomalytic glaucoma.
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The definition of T2 lesions has been modified, and T2 has been divided by the addition T2a.
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T2 is defined as tumor confluent with or extending into the ciliary body and/or choroid.
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T2a is defined as tumor confluent with or extending into the ciliary body and/or choroid with melanomalytic glaucoma.
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The definition of T3 lesions has been modified, and T3 has been divided by the addition T3a.
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T3 is defined as tumor confluent with or extending into the ciliary body and/or choroid with extra scleral extension.
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T3a is defined as tumor confluent with or extending into the ciliary body with extrascleral extension and melanomalytic glaucoma.
Ciliary Body and Choroid
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The definition of Tl lesions has been modified, and Tl has been divided into Tla, T1b, and T1c.
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T1 is defined as tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness).
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T1a is defined as tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness) without extraocular extension.
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T1b is defined as tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness) with microscopic extraocular extension.
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T1c is defined as tumor 10 mm or less in greatest diameter and 2.5 mm or less in greatest height (thickness) with macroscopic extraocular extension.
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The definition of T2 lesions has been modified, and T2 has been divided into T2a, T2b, and T2c.
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American Joint Committee on Cancer. (2002). Malignant Melanoma of the Uvea. In: Greene, F.L., et al. AJCC Cancer Staging Manual. Springer, New York, NY. https://doi.org/10.1007/978-1-4757-3656-4_43
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