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Stages of Intraocular (Eye) Melanoma

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Stage IV

In stage IV, the tumor may be any size and has spread:

  • to nearby lymph nodes; or
  • to other parts of the body.

The following stages are used for intraocular melanoma of the ciliary body and choroid:

Intraocular melanoma of the ciliary body and choroid is grouped into 4 size categories. The category depends on how wide and thick the tumor is. Category 1 tumors are the smallest and category 4 tumors are the biggest.

Category 1:

  • The tumor is not more than 12 millimeters wide and not more than 3 millimeters thick; or
  • the tumor is not more than 9 millimeters wide and 3.1 to 6 millimeters thick.

Category 2:

  • The tumor is 12.1 to 18 millimeters wide and not more than 3 millimeters thick; or
  • the tumor is 9.1 to 15 millimeters wide and 3.1 to 6 millimeters thick; or
  • the tumor is not more than 12 millimeters wide and 6.1 to 9 millimeters thick.

Category 3:

  • The tumor is 15.1 to 18 millimeters wide and 3.1 to 6 millimeters thick; or
  • the tumor is 12.1 to 18 millimeters wide and 6.1 to 9 millimeters thick; or
  • the tumor is 3.1 to 18 millimeters wide and 9.1 to 12 millimeters thick; or
  • the tumor is 9.1 to 15 millimeters wide and 12.1 to 15 millimeters thick.

Category 4:

  • The tumor is more than 18 millimeters wide and may be any thickness; or
  • the tumor is 15.1 to 18 millimeters wide and more than 12 millimeters thick; or
  • the tumor is 12.1 to 15 millimeters wide and more than 15 millimeters thick.

Stage I

In stage I, the tumor is size category 1 and in the choroid only.

Stage II

Stage II is divided into stages IIA and IIB.

  • In stage IIA, the tumor:
    • is size category 1 and has spread to the ciliary body; or
    • is size category 1 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 may have spread to the ciliary body; or
    • is size category 2 and is in the choroid only.
  • In stage IIB, the tumor:
    • is size category 2 and has spread to the ciliary body; or
    • is size category 3 and is in the choroid only.

Stage III

Stage III is divided into stages IIIA, IIIB, and IIIC.

  • In stage IIIA, the tumor:
    • is size category 2 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 may have spread to the ciliary body; or
    • is size category 3 and has spread to the ciliary body; or
    • is size category 3 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; or
    • is size category 4 and is in the choroid only.
  • In stage IIIB, the tumor:
    • is size category 3 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
    • is size category 4 and has spread to the ciliary body; or
    • 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.
  • In stage IIIC, the tumor:
    • 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 spread to the ciliary body; or
    • may be any size and has spread through the sclera to the outside of the eyeball. The part of the tumor outside the eyeball is more than 5 millimeters thick. The tumor has not spread to the ciliary body.
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