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Clinical characteristics of T1–T4 choroidal melanomas.
| Category | T1 | T2 | T3 | T4 |
|---|---|---|---|---|
| Incidence (% from 100%) | 46 | 27 | 21 | 6 |
| Age at presentation (years) | 57 | 58 | 58 | 61 |
| Tumor base (mm) | 8 | 12 | 15 | 20 |
| Tumor thickness (mm) | 3.5 | 5.2 | 8.9 | 11.4 |
| Mushroom-shaped (%) | 8 | 20 | 38 | 39 |
| Associated subretinal fluid (%) | 64 | 80 | 82 | 83 |
| Intraocular hemorrhage (%) | 5 | 12 | 17 | 18 |
| Rupture of Bruch’s membrane (%) | 9 | 24 | 40 | 40 |
| Extraocular extension (%) | <1 | 1 | 4 | 12 |
| Metastases at 10 years (%) | 15 | 25 | 49 | 63 |
Source: Reference [7].
