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Lesion
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Severity
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Index definition*
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|---|
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Comedone
|
0.5
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Horny follicular plug and pinhead-sized follicular papules
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Papule
|
1.0
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Infiltrated papules 2–8 mm
|
|
Pustule
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2.0
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Pustules 42 mm with surrounding inflammation
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|
Infiltrate
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3.0
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Nodules and infiltrates: 48 mm and coalescent papules where individual papules cannot be distinguished
|
|
Cyst
|
4.0
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Lesions where infiltrate has broken down to form discharging cyst
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- *Michaelsson et al. (1977); Cosmetic Surgery National Data Bank (2003)
