title: Erythema nodosum.
mesh_terms: D001168:Arthritis / Q000150:complications; D001706:Biopsy; D003093:Colitis, Ulcerative / Q000150:complications; D004893:Erythema Nodosum / Q000150:complications; D006801:Humans; D013583:Synovial Membrane / Q000473:pathology