Abstract:Objective To evaluate the clinical value of endoscopic ultrasonography (EUS) in diagnosis of digestive tract submucosal lesions (SML).Methods This was a retrospective study involving patients diagnosed with SML using EUS and confirmed by histopathology from January 2020 to December 2021.Results 142 patients with SML were examined by EUS. There were 135 solid tumors and 7 extramural compression. In solid tumors, 14 cases of mucosal lesions, 20 cases of mucosal muscular lesions, 62 cases of submucosal lesions, and 39 cases of muscularis propria lesions were diagnosed by EUS. The accuracy of EUS lamellar diagnosis respectively was 100.0%, 100.0%, 95.0%, and 89.7%. 30 cases of leiomyoma (21.1%), 29 cases of mesenchymal tumor (20.4%), 25 cases of neuroendocrine tumor (17.6%), 15 cases of ectopic pancreas (10.6%), 14 cases of polyp (9.9%), 11 cases of lipoma (7.7%), 9 cases of cyst (6.3%), 7 cases of extramural compression (4.9%), 2 cases of granular cell tumor (1.4%) were diagnosed by EUS. 107 patients underwent endoscopic treatment or surgical resection, and 99 cases were pathologically consistent with EUS diagnosis. The overall diagnostic accuracy of EUS was about 92.5%.Conclusion The diagnostic accuracy of endoscopic ultrasonography for submucosal lesions is related to the origin of lesions, and the mucosal and mucosal muscularity have the highest diagnostic accuracy. EUS also has good diagnostic value in differentiating intramural lesions from extramural compression. EUS can determine the nature of SML to a certain extent and help to determine the treatment of lesions.