Systematic ReviewPublished 1 October 2026Circulating and cerebrospinal fluid soluble TREM2 levels and risk of perioperative neurocognitive disorders in surgical patients: a systematic review and meta-analysisHaotian Wu · Yujie Wang · Zhifeng Gao · Huan ZhangFrontiers in Aging Neurosciencedoi 10.3389/fnagi.2026.1899745