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Clinico-pathological patterns of red tattoo reactions
| Skin reaction | Histology |
|---|---|
| Allergic contact dermatitis | Acanthosis, spongiosis, perivascular lymphocytic inflammatory infiltrate |
| Lichenoid dermatoses | Acanthosis and thickening of the stratum corneum |
| Granulomatous | Giant cell positive or negative |
| Pseudolmphomatous | T- or B-cell lymphoma equivalent |
| Pseudoepitheliomatous hyperplasia | Reactive changes: similar to SCC and keratoacanthoma |
| Irregular acanthosis | |
| Low mitotic activity |
