IL2 and irritable bowel syndrome: The expression of the pro-inflammatory cytokine IL-2 in the mucosal biopsy of IBS patients was higher than in healthy volunteers in duodenum (3.4 ± 0.6 versus 1.50 ± 0.51 points, respectively), ileum (3.7 ± 0.6 and 1.5 ± 0.5), cecum (5.1 ± 0.8 and 1.4 ± 0.5), sigmoid colon (5.3 ± 0.8 and 1.3 ± 0.5; p < 0.0001 for all localizations; Fig 2).