IL6 and syringocystadenoma papilliferum: In the ROC curve analysis, the AUC of IL‐6, CD4+ T cells and PCT were 0.605 (95% CI 0.504–0.706, p = .047), 0.671 (95% CI 0.574–0.768, p = .001) and 0.684 (95% CI 0.587–0.781, p = .001) respectively in predicting SCAP (Figure 3A,B).