Differentiation and stimulation of tissue repair, 740 50.6 Mesenchymal stromal cell administration in inflammatory bowel diseases, 740 50.6.1 Mesenchymal stromal cell administration for fistulizing Crohn's disease, 741 50.6.2 Autologous mesenchymal stromal cell administration for fistulizing Crohn's disease, 741 50.1 Inflammatory bowel diseases Inflammatory bowel diseases (IBDs) are chronic relapsing dis eases associated with debilitating symptoms and leading to progressive intestinal tissue damage and disability (Figure 50.1). Crohn's disease (CD) can affect any part of the gastrointestinal tract, and lesions are often segmental and transmural. The disease was named after gastroenterologist Dr Burrill Bernard