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. This evidence concerns the gene IL1B and vascular disorder.