Simultaneous occurrence of hyperthyroidism and fistulizing Crohn’s disease complicated with intra-abdominal fistulas and abscess: a case report and review of the literature

摘要

IntroductionFistula formation in patients with Crohn’s disease is a common complication during the course of the disease. Perianal and enteroenteric are the most common forms of fistulas, whereas the involvement of the upper gastrointestinal tract with gastrocolic and duodenocolic fistulas represents an extremely unusual condition. Moreover, hyperthyroidism in association with Crohn’s disease has been rarely described.