Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease with strong association with psoriasis and inflammatory bowel disease (IBD). While some signaling pathways are well defined in HS, the role of TNF-like ligand 1 (TL1A) is not well understood. A group of researchers has investigated the association of TL1A with HS, as well as its association with other cytokine networks.