Table 2.

Dermatological criteria and gradation of chronic arsenic toxicity scoring system

Pigmentation (Score)
Mild (1)	Moderate (2)	Severe (3)
Diffuse melanosis, Mild spotty pigmentation, Leucomelanosis	Moderate spotty pigmentation	Blotchy pigmentation, pigmentation of under surface of tongue, buccal mucosa
Keratosis (Score)
Mild (1)	Moderate (2)	Severe (3)
Slight thickening, or minute papules (<2 mm) in palm and soles	Multiple raised keratosis papules (2 to 5 mm) in palm and soles with diffuse thickening	Diffuse severe thickening, large discreet or confluent keratotic elevations (>5mm), palm and soles (also dorsum of extremity and trunk)

Maximum total skin score=6; Total skin score: No skin lesion-0; Mild: 1- 2; Moderate: 3- 4; Severe:5- 6