Research Article
Ashy Dermatosis and Lichen Planus Pigmentosus: The Histopathological Differences
Table 3
Histopathological differences between AD (n = 29) and LPP (n = 71).
| Histological features | AD, n (%) | LPP, n (%) | value |
| Epidermal atrophy | 7 (24.1) | 13 (18.3) | 0.51 | Epidermal hypergranulosis | 0 (0) | 25 (35.2) | <0.001 | Epidermal hyperkeratosis | 0 (0) | 24 (33.8) | <0.001 | Apoptotic keratinocytes | 16 (55.2) | 47 (66.2) | 0.30 | Basal vacuolization | 27 (96.4) | 55 (77.5) | 0.02 | (i) Focal | 27 (100) | 51 (92.7) | | (ii) Diffuse | 0 (0) | 4 (7.3) | | Lichenoid dermatitis | 2 (7.1) | 35 (49.3) | <0.001 | (i) Focal | 2 (100) | 31 (88.6) | | (ii) Diffuse | 0 (0) | 4 (11.4) | | Superficial perivascular lymphocytic infiltration | 29 (100) | 68 (95.8) | 0.55 | (i) Mild | 26 (92.9) | 45 (67.2) | 0.04 | (ii) Moderate | 2 (7.1) | 19 (28.4) | | (iii) Severe | 0 (0) | 3 (4.5) | | Deep perivascular lymphocytic infiltration | 0 (0) | 5 (7.0) | 0.32 | Perifollicular infiltration | 3 (10.3) | 34 (47.9) | <0.001 | Perifollicular fibrosis | 3 (10.3) | 25 (35.2) | 0.01 | Perieccrine infiltration | 0 (0) | 6 (8.5) | 0.18 | Pigmentary incontinence | | | 0.015 | (i) Mild | 3 (10.3) | 1 (1.4) | | (ii) Moderate | 25 (86.2) | 55 (77.5) | | (iii) Severe | 1 (3.5) | 15 (21.1) | |
|
|