Salivary biomarkers as a non-invasive diagnostic tool for gastric cancer: a systematic review and meta-analysis.
BACKGROUND Gastric cancer (GC) remains a leading cause of cancer-related mortality worldwide, with an average survival of just 12 months. Its aggressive nature and nonspecific symptoms often lead to late-stage diagnosis. Current diagnostic methods rely heavily on esophagogastroduodenoscopy, which is invasive and costly...