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AIM:To evaluate the role of miniprobe ultrasonography undercolonoscope in the diagnosis of submucosal tumor of thelarge intestine,and to determine its imaging characteristics.METHODS:Thirty-five patients with submucosal tumorsof the large intestine underwent miniprobe ultrasonographyunder colonoscope.The diagnostic results of miniprobeultrasonography were compared with pathological findingsof specimens by biopsy and surgical resection.RESULTS:Lipomas were visualized as hyperechoichomogeneous masses located in the submucosa with adistinct border.Leiomyomas were visualized as hypoechoichomogeneous mass originated from the muscularis propria.Leiomyosarcomas were shown with inhomogeneous echoand irregular border.Carcinoids were presented assubmucosal hypoechoic masses with homogenous echoand distinct border.Lymphangiomas were shown assubmocosal hypoechoic masses with cystic septal structures.Malignant lymphomas displayed as hypoechoic massesfrom mucosa to muscularis propria,while pneumatosiscystoids intestinalis originated from submucosa with aspecial sonic shadow.One large leiomyoma was misdiagnosedas leiomyosarcoma.CONCLUSION:Endoscopic miniprobe ultrasonography canprovide precise information about the size,layer of origin,border of submucosal tumor of the large intestine and hasa high accuracy in the diagnosis of submucosal tumor ofthe large intestine.Pre-operative miniprobe ultrasonographyunder colonoscope may play an important role in the choiceof therapy for submucosal tumor of the large intestine.
AIM: To evaluate the role of miniprobe ultrasonography undercolonoscope in the diagnosis of submucosal tumor of the large intestine, and to determine its imaging characteristics. METHODS: Thirty-five patients with submucosal tumors of the large intestine underwent miniprobe ultrasonographyunder colonoscope. The diagnostic results of miniprobeultrasonography were compared with pathological findings of specimens by biopsy and surgical resection .RESULTS: Lipomas were visualized as hyperechoichomogeneous masses located in the submucosa with adistinct border. Leiomyomas were visualized as hypoechoichomogeneous mass originated from the muscularis propria. Leiomyosarcomas were shown with inhomogeneous echo and irregular borders .Carcinoids were presented assubmucosal hypoechoic masses with homogenous echo and distinct border. Lymphangiomas were shown assubmocosal hypoechoic masses with cystic septal structures. Malignant lymphomas displayed as hypoechoic masses from mucosa to muscularis propria, while pneumatos iscystoids intestinalis originated from submucosa with aspecial sonic shadow. Large large leiomyoma was misdiagnosedas leiomyosarcoma. CONCLUSION: Endoscopic miniprobe ultrasonography canprovide precise information about the size, layer of origin, border of submucosal tumor of the large intestine and hasa high accuracy in the diagnosis of submucosal tumor of the large intestine. Pre-operative miniprobe ultrasonographyunder colonoscope may play an important role in the choice of therapy for submucosal tumor of the large intestine.