RT Journal Article SR Electronic T1 Application of serum gastric function markers and digestive tumor indices to the diagnosis of early gastric cancer and precancerous lesions JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 795 OP 800 DO 10.15537/smj.2023.44.8.20230231 VO 44 IS 8 A1 Yanan, Zhu A1 Juan, Wang A1 Jun, Wang A1 Xin, Ma A1 Kejian, Wu A1 Fangyu, Wang YR 2023 UL http://smj.org.sa/content/44/8/795.abstract AB Objectives: To study the levels of carcinoembryonic antigen (CEA), carbohydrate antigen (CA) 199, CA724, CA242, pepsinogen (PG) I, PGII, gastrin-17 (G-17), the PGI/PGII ratio (PGR), as well as the expression of p27 and Ki67, in patients suffering from early gastric cancer and intraepithelial neoplasia and to provide new markers for the diagnosis of early gastric cancer and precancerous lesions.Methods: A retrospective study where the blood serum concentration of CEA, CA199, CA724, CA242, PGI, PGII, G-17 and PGR were tested and also the protein expression of p27 and Ki67 was detected in patients tissues by immunohistochemistry in the Gastrointestinal Endoscopy Center of the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China, from March 2018 to March 2021.Results: Carbohydrate antigen 242 and CA199 levels in tumor tissue significantly differed among the groups. Pepsinogen I levels decreased with increasing disease severity, G-17 levels increased with the aggravation of severity, and p27 expression decreased with the severity.Conclusion: The combination of serum gastric function markers (PGI and G-17) and p27 digestive tumor indices can serve as markers for the diagnosis of early gastric cancer and intraepithelial neoplasia.