EOD Primary Tumor
Notes
**Note 1:** **Uveal melanomas** * Uveal melanomas arise most commonly in the choroid, less frequently in the ciliary body, and least often in the iris. * Melanomas of the iris tend to be small, and those arising from or extending to the ciliary body typically are large. **Note 2:** **Ciliary body and choroid melanomas** * Primary ciliary body and choroidal melanomas are classified according to four tumor size categories. The tumor size categories are based on the largest basal and thickness. * Basal diameter is collected in data item *Measured Basal Diameter* [NAACCR Date Item #3887] * Thickness is collected in the data item *Measured Thickness* [NAACCR Data Item #3888] **Note 3:** **Discrete tumor deposit(s)** * Discrete tumor deposit(s) in the orbit that are not contiguous to the eye are recorded in lymph nodes (See EOD Regional Nodes).| Code | Description | SS2018 T |
|---|---|---|
| 000 | In situ: intraepithelial, noninvasive | IS |
| 100 | Any tumor size category - UNKNOWN if ciliary body involvement OR extraocular extension Localized, NOS | L |
| 200 | Any tumor size category - WITHOUT ciliary body involvement AND extraocular extension | L |
| 300 | Any tumor size category - WITH ciliary body involvement | L |
| 400 | Any tumor size category - WITH extraocular extension less than or equal to 5 mm in largest diameter - NONE or UNKNOWN if ciliary body involvement | RE |
| 500 | Any tumor size category - WITH ciliary body involvement - AND extraocular extension less than or equal to 5 mm in largest diameter | RE |
| 600 | Extraocular extension GREATER than 5 mm | RE |
| 700 | Extraocular extension, NOS UNKNOWN measurement WITH or WITHOUT ciliary body involvement | RE |
| 800 | No evidence of primary tumor | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in medical record Death Certificate Only | U |