Systematic review: factors associated with relapse of inflammatory bowel disease after discontinuation of anti-TNF therapy.

BACKGROUND: The discontinuation of anti-tumour necrosis factor (anti-TNF) treatment in inflammatory bowel disease (IBD) patients in remission could be considered. AIM: To evaluate the factors associated with relapse of IBD after discontinuation of anti-TNF therapy.
METHODS: Electronic (PubMed/Embase) and manual search up to January 2015.
RESULTS: The overall risk of relapse after discontinuation of anti-TNFs (27 studies) was 44% for Crohn's disease (CD; follow-up range: 6-125 months) and 38% for ulcerative colitis (follow-up range: 6-24 months). Several factors were investigated to identify patients who are more likely to achieve long-lasting remission after anti-TNF discontinuation. The factors associated with a higher risk of relapse are younger age, smoking, longer disease duration, and fistulising perianal CD. Laboratory markers such as low haemoglobin levels, high C-reactive protein levels and high faecal calprotectin seem to increase the risk of relapse. On the other hand, low serum anti-TNF levels seem to be associated with a lower risk of flare-up. Mucosal healing seems to decrease the risk of relapse after anti-TNF discontinuation (overall, this risk is 26% at 1 year with mucosal healing and 42% without), although this observation has not been confirmed by some authors. In patients receiving escalated anti-TNF doses or receiving anti-TNFs for the prevention of post-operative CD recurrence, the risk of relapse after discontinuation is high (>75%). Re-administration of the drug in those who relapsed after stopping treatment is effective and safe.
CONCLUSIONS: A high proportion of patients with IBD relapse after discontinuation of anti-TNF treatment. As available data are insufficient to make strong recommendations on when anti-TNF therapy could be stopped, decisions should be taken on an individual basis.