1: erythema
2: scaling
3: definite borders
4: itching
5: koebner phenomenon
6: polygonal papules
7: follicular papules
8: oral mucosal involvement
9: knee and elbow involvement
10: scalp involvement
11: family history
12: melanin incontinence
13: eosinophils in the infiltrate
14: PNL infiltrate
15: fibrosis of the papillary dermis
16: exocytosis
17: acanthosis
18: hyperkeratosis
19: parakeratosis
20: clubbing of the rete ridges
21: elongation of the rete ridges
22: thinning of the suprapapillary epidermis
23: spongiform pustule
24: munro microabcess
25: focal hypergranulosis
26: disappearance of the granular layer
27: vacuolisation and damage of basal layer
28: spongiosis
29: saw-tooth appearance of retes
30: follicular horn plug
31: perifollicular parakeratosis
32: inflammatory monoluclear inflitrate
33: band-like infiltrate
34: Age