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Outcomes of upper endoscopy screening in Lynch syndrome: a meta-analysis

Published:September 06, 2022DOI:https://doi.org/10.1016/j.gie.2022.08.040

      Background and Aims

      Lynch syndrome (LS) predisposes affected individuals to a high lifetime risk of malignancies, including colorectal, endometrial, gastric, and duodenal cancers. The role of upper GI (UGI) cancer screening in LS has been uncertain, but recent studies have evaluated its utility.

      Methods

      Databases were queried through December 2021 to identify studies that examined upper endoscopy screening in LS using EGD. Mantel-Haenszel pooled odds ratios and 95% confidence intervals (CIs) for outcomes were constructed using a random-effects model to identify pooled odds of endoscopic findings in persons with LS. Event rates for detection of gastric and duodenal cancers, high-risk lesions, and clinically actionable findings were calculated. Statistical heterogeneity was assessed using the I2 statistic.

      Results

      Nine studies were identified with 2356 LS patients undergoing approximately 7838 EGDs. In total, 47 LS-associated UGI cancers (18 gastric and 29 duodenal cancers), 237 high-risk lesions, and 335 clinically actionable findings were identified. The pooled event rate for detection of any UGI cancer, high-risk lesions, and clinically actionable findings during screening were .9% (95% CI, .3-2.1; I2 = 89%), 4.2% (95% CI, 1.6-10.9; I2 = 98%), and 6.2% (95% CI, 2.2-16.5; I2 = 99%), respectively. There was no difference between LS-associated gene and gastric or duodenal cancer detection.

      Conclusions

      In LS, there is evidence that endoscopic screening detects UGI cancers, precancerous lesions, and other clinically actionable findings that favor its use as a part of cancer risk management in LS.

      Abbreviations:

      CI (confidence interval), HP (Helicobacter pylori), LS (Lynch syndrome), PIR (pooled incidence rate), UGI (upper GI)
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