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Remission induction, maintenance, and endoscopic outcome with oral 5-aminosalicylic acid in intestinal Behçet's disease.

BACKGROUND AND AIM: Oral 5-aminosalicylic acid (5-ASA) is recommended for the therapy of mild to moderate intestinal Behçet's disease (BD). However, the induction remission efficacy and endoscopic outcomes of 5-ASA are unknown. We investigated remission induction at 8 weeks, endoscopic outcomes until 52 weeks, and event-free survival at 52 weeks in patients with intestinal BD treated with 5-ASA.

METHODS: Forty-one patients with intestinal BD were treated with oral 5-ASA. Clinical remission was evaluated with the Crohn's disease activity index (CDAI). The endoscopic response was evaluated using the modified global gastrointestinal endoscopic assessment scores. Rescue therapy-free survival and surgery-free survival at 52 weeks were estimated, and predictive factors for a clinical response at weeks 8 and 52 were identified.

RESULTS: Seven patients (17%) withdrew 5-ASA early (≤ 8 weeks) because of adverse events. At week 8, clinical efficacy could be accurately evaluated in 28 patients, and the response and remission rates were 61% and 57%, respectively, using the CDAI. Endoscopic evaluation was achieved in 17 patients up to 52 weeks, and the endoscopic response and remission rates were 71% and 35%, respectively. The probabilities of rescue therapy-free survival and surgery-free survival were 73% and 100%, respectively, at 52 weeks in all 41 patients. The predictive factors for therapeutic effectiveness at week 8 were a higher baseline C-reactive protein level and CDAI, but they were negative predictive factors for a 52-week response.

CONCLUSIONS: 5-ASA is effective for clinical and endoscopic induction and maintaining a response in patients with mild to moderate intestinal BD.

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