Figure 3: Production of IFN-γ, IL-12A, and IL-17A in cases with or without abscess formation. (−): low expression of cytokines; (+): high expression of cytokines. Fifteen patients had lesions with abscess formation, while 16 patients did not have them. More cases with high expressions of IFN-γ and IL-17A in stromal inflammatory cells could be found in patients with abscess formation. .