IL1A and psoriasis: These pustular forms of psoriasis, which include generalized pustular psoriasis (GPP), palmoplantar pustular psoriasis (PPPP), and acrodermatitis continua of Hallopeau (ACH) (Navarini et al., 2017) are all characterized by high expression levels of IL-1–related cytokines and chemokines that drive neutrophil recruitment to the skin, indicating that they are part of the autoinflammatory spectrum of psoriasis (Johnston et al., 2017; Bachelez, 2018).