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Showing frequency of risk factors for SCC from our case series and literature review.
| Risk factor | Number of patients |
|---|---|
| Caucasian | 9 |
| UV exposure | 5 |
| Smoking | 3 |
| Scleroderma | 1 |
| Immunosuppressed | 3 |
| Previous skin cancer or in-situ disease | 4 |
| Human Papilloma Virus | 3 |
| Chemical Exposure | 1 |
| Trauma / burn | 11 |
| Epidermolysis Bullosa (Inc Kindler Syndrome) | 3 |
| Chronic Infection | 5 |
| Ionising Radiation Exposure | 1 |
| Not documented | 7 |
