IL23A and granular corneal dystrophy type II: Similar to ACD, psoriasis is caused primarily by TNF-α, IL-1β, and IL-6 produced by keratinocytes, which stimulate plasmacytoid dendritic cells to produce interferon-α (IFN-α) followed by its stimulation of IL-12 and IL-23 release by dendritic cells nearby lymph nodes.