Research Article
Ashy Dermatosis and Lichen Planus Pigmentosus: The Histopathological Differences
Table 2
Clinical characteristics of patients with AD (n = 29) and LPP (n = 71).
| | Characteristics | AD, n (%) | LPP, n (%) |
| | Colour | | | | Slate-grey | 17 (58.6) | 3 (4.2) | | Purplish-grey | 2 (6.9) | 24 (33.8) | | Brown-grey | 10 (34.5) | 44 (62.0) | | Erythematous peripheral rim | 1 (3.5) | 0 (0) | | Morphology | | | | Macule | 7 (24.1) | 8 (11.3) | | Patch | 22 (75.9) | 60 (84.5) | | Both macules and patches | 0 (0) | 3 (4.2) | | Border | | | | Well-defined | 4 (13.8) | 3 (4.2) | | Ill-defined | 25 (86.2) | 68 (95.8) | | Pattern of hyperpigmentation | | | | Diffuse | 19 (65.5) | 22 (31.0) | | Reticular | 1 (3.5) | 33 (46.5) | | Blotchy | 9 (31.0) | 14 (19.7) | | Linear | 0 (0) | 1 (1.4) | | Perifollicular | 0 (0) | 1 (1.4) | | Size of hyperpigmentation | | | | <1 cm | 4 (13.8) | 4 (5.6) | | 1–5 cm | 11 (37.9) | 38 (53.5) | | 5–10 cm | 12 (41.4) | 26 (36.6) | | >10 cm | 2 (6.9) | 3 (4.2) | | Distribution | | | | Sun-exposed area | 12 (41.4) | 42 (59.2) | | Bilateral | 24 (82.8) | 66 (94.3) | | Location | | | | Face and neck | 17 (58.6) | 57 (80.3) | | Chest | 8 (27.6) | 10 (14.1) | | Back | 16 (55.2) | 18 (25.4) | | Abdomen | 14 (48.3) | 12 (16.9) | | Upper extremities | 10 (34.5) | 29 (40.9) | | Lower extremities | 7 (24.1) | 17 (23.9) | | Flexors (overall) | 9 (31.0) | 46 (64.8) | | (i) Submammary area | 1 (3.5) | 7 (9.9) | | (ii) Axilla | 3 (10.3) | 8 (11.3) | | (iii) Groin | 0 (0) | 4 (5.6) | | (iv) Cubital fossa | 2 (6.9) | 9 (12.7) | | (v) Popliteal fossa | 2 (6.9) | 8 (11.3) |
|
|
Clinical characteristics based on recent global consensus [ 5]. |
