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Ratios of the inflammatory cell infiltrate.
| CD3:CD20 | CD4:CD8 | |
| Early KA | 14:1 | 5:1 |
| Mid KA | 8:1 | 3:1 |
| Late KA | 5:1 | 1:1 |
| Early BLK | 17:1 | 2:1 |
| Mid BLK | 7:1 | 1:1 |
| Late BLK | 4:1 | 0.9:1 |
| Early HN | 10:1 | 1:1 |
| Mid HN | 11:1 | 1:1 |
| Late HN | 16:1 | 0.9:1 |
KA, keratoacanthoma; BLK, benign lichenoid keratosis; HN, halo nevus.
