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Copyright ©The Author(s) 2021.
World J Clin Cases. May 26, 2021; 9(15): 3506-3516
Published online May 26, 2021. doi: 10.12998/wjcc.v9.i15.3506
Table 1 Hurley stages

Clinical manifestations
Grade IAbscess (single or multiple) without sinus tracts and cicatrization/scarring
Grade IIRecurrent abscess with sinus tracts and scarring, single or multiple widely separated lesions
Grade ШDiffuse or almost diffuse involvement, or multiple interconnected sinus tracts and abscesses across the entire area