TNF and vascular disorder: In addition, MPA (%) was positively correlated with plasma levels of IL‐1β (p = 0.0209) (Figure 1D) and TNF‐α (p = 0.0016) (Figure 1E), with both suggested as requirements for inducing KD vasculopathy.[17] In our second cohort involving randomly enrolled participants, MPA levels were measured at hospital admission before classifying CAA or non‐CAA (NCAA) to assess the potential of MPA for predicting CAA development.