IL17A and Dorfman-Chanarin disease: Recent insights into the immunological overlap between DCS, hidradenitis suppurativa (HS), and other autoinflammatory follicular disorders have expanded therapeutic options, particularly with biologic agents targeting tumor necrosis factor alpha (TNF-α), interleukin (IL)-17, and IL-23 pathways, as well as Janus kinase (JAK) inhibitors.