Table 2.
Results for type of p53‐binding protein 1 (53BP1) expression in skin tumors by immunofluorescence
| n | Stable | Low DDR | High DDR | Mixed DDR and abnormal | Abnormal | |
|---|---|---|---|---|---|---|
| Epidermis | ||||||
| non‐exposed | 14 | 13 (92.9%) | 1 (7.1%) | 0 | 0 | 0 |
| sun‐exposed | 8 | 2 (25.0%) | 5 (62.5%) | 1 (12.5%) | 0 | 0 |
| SK | ||||||
| non‐exposed | 10 | 10 | 0 | 0 | 0 | 0 |
| sun‐exposed | 10 | 4 (40.0%) | 6 (60.0%) | 0 | 0 | 0 |
| AK | 8 | 1 (12.5%) | 3 (37.5%) | 4 (50.0%) | 0 | 0 |
| BD | 9 | 1 (11.1%) | 2 (22.2%) | 4 (44.4%) | 2 (22.2%) | 0 |
| SCC | 9 | 0 | 0 | 0 | 4 (44.4%) | 5 (55.6%) |
| BCC | 10 | 0 | 0 | 0 | 1 (10.0%) | 9 (90.0%) |
DDR, DNA damage response; SK, seborrheic keratosis; AK, actinic keratosis; BD, Bowen's disease; SCC, squamous cell carcinoma; BCC, basal cell carcinoma.