Table 4 Global Acne Scarring Classification(GASC)

(Grade) Type Number oflesions:1(1-0) Number oflesions:2(11-20) Number oflesions:3(>20)
(A) Milder scarring(1 point each)Macular erythermatious or pigmentedMildly atrophic dish-like 1point 2points 3points
(B)Moderate scarring(2 points each)Moderately atrophic dish-likePunched out with shallow bases small scars(<5㎜)Shallow but broad atrophic areas 2points 4points 6points
(C) Severe scarring(3 points each)Punched out with deep but normal bases, small scars(<5㎜)Punched out with deep abnormal bases, small scars(<5㎜)Linear or troughed dermal scarringDeep, broad atrophic areas 3points 6points 9points
(D) Hyperplastic scarringHyperplasticPapuluar scarsHyperplasticKeloidal/hypertrophic scars 2points Area <5㎠ 6 points 2points Area 5-20㎠ 12 points 2points Area > 20㎠ 18 points