Background: Interleukin-33 (IL-33) has recently been implicated in tumor development. Methods: Datawas obtained from PubMed, EMBASE, Clinical trial, Cochrane Library, Web of Science, CNKI and Wanfangdatabases. After quality assessment and data extraction, a meta-analysis was performed using Review Manager5. 2 software. Results: There were eight documents included in this meta-analysis. The results showed IL33 levelsto be higher in tumor patients than that in health people, but no correlations tumor stage, metastasis and survivaltime of tumor patients were evident. Conclusion: IL33 may be useful as an alarm factor in tumor detection andprognosis.
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