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Inflamm Bowel Dis. 2017 Dec;23(12):2238-2244. doi: 10.1097/MIB.0000000000001275.

Impact of Histological and Endoscopic Remissions on Clinical Recurrence and Recurrence-free Time in Ulcerative Colitis.

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1
Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia, Espinho, Portugal.

Abstract

BACKGROUND:

Clinical and endoscopic remissions constitute the therapeutic goals in ulcerative colitis (UC). Histological healing is currently not a target in UC. This study aims to determine the impact of the definition of endoscopic remission (Mayo endoscopic subscore [MSe] 0-1) and histological activity in the recurrence of UC and recurrence-free survival time.

METHODS:

Patients with UC in clinical remission (partial Mayo score ≤ 1) and endoscopic remission (MSe ≤ 1) who underwent colonoscopy with biopsies between March 2010 and December 2013 were included. The validated Nancy score was used to evaluate histological activity, which considers inactivity if 0 to 1 and activity if 2 to 4. The recurrence-free time was evaluated and recurrence was defined as partial Mayo score ≥ 2, therapy to induce remission, hospitalization, or colectomy. Predictive factors associated with recurrence and time to recurrence were determined.

RESULTS:

Sixty patients were included; 58.3% (n = 35) were women, with a mean age of 52.7 years. MSe = 1 was observed in 46.7% (n = 28) and histological activity in 38.3% (n = 23). Clinical recurrence occurred in 31.7% (n = 19) of patients, with a cumulative risk of 17.1%/24.5%/26.7%/40.1% at 12/24/36/48 months, respectively. MSe = 1 (P = 0.02) and histological activity (P = 0.007) were significantly associated with recurrence. Of these, only histological activity (P = 0.03) was an independent predictive factor of recurrence. Patients with MSe = 1 (P = 0.02) and with histological activity (P = 0.01) had a significantly shorter recurrence-free time in univariate analysis. In multivariate analysis, only histological activity (P = 0.02) was an independent predictive factor of lower recurrence-free time.

CONCLUSION:

The presence of histological activity represents an independent predictive factor of recurrence and time to recurrence, which was not verified with MSe 0 to 1.

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