Clinical Significance of Granulomas in Crohn’s Disease: A Systematic Review and Meta-analysis.

Clinical Significance of Granulomas in Crohn’s Disease: A Systematic Review and Meta-analysis.

J Gastroenterol Hepatol. 2019 Sep 14;:

Authors: Hong SW, Yoon H, Shin CM, Park YS, Kim N, Lee DH, Kim JS

BACKGROUND AND AIM: Epithelioid granuloma is one hallmark used to histologically diagnose Crohn’s disease (CD). However, the clinical significance of granulomas in CD is unclear. Therefore, we performed a meta-analysis to compare the clinical features with CD according to the presence of granulomas.
METHODS: A literature search in PubMed, EMBASE, and Cochrane databases was performed on manuscripts published until Oct 2018. We included studies that met the following inclusion criteria; (1) patient: patients with CD; (2) exposure: granulomas on the pathology; (3) comparator: no granulomas; (4) outcomes: disease location, disease behaviour, perianal disease, disease activity, use of biologics, and CD-associated hospitalization, surgery.
RESULTS: Nineteen studies met our inclusion criteria. Granulomas in CD patients were associated with a higher proportion of ileocolonic disease (odds ratio [OR] 1.49, 95% confidence interval [CI]: 1.21-1.83), a higher proportion of upper gastrointestinal disease (OR: 2.25, 95% CI: 1.28-3.95), a higher proportion of penetrating behaviour (OR: 1.48, 95% CI: 1.09-2.01), a higher prevalence of perianal disease (OR: 2.15, 95% CI: 1.48-3.11) and a higher severity index at presentation (standardized mean difference [SMD]: 0.20, 95% CI: 0.09-0.32). In addition, use of biologics was significantly higher in CD patients with granulomas compared to without granulomas (OR: 1.66, 95% CI: 1.07-2.59). The presence of granulomas was significantly associated with CD-associated hospitalization (OR: 3.88, 95% CI: 1.44-10.49), but not with CD-associated surgery.
CONCLUSIONS: Clinical features in CD patients were significantly different according to the presence of granulomas. It may indicate a more aggressive phenotype of CD.

PMID: 31522456 [PubMed – as supplied by publisher]

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