This study aims to evaluate the diagnostic accuracy of endoscopic ultrasound (EUS) for colorectal submucosal tumors/lesions (SMTs/SELs) and to identify factors associated with correct EUS diagnosis. Using cases with histopathologic confirmation as the reference standard, EUS-based preoperative diagnoses will be compared with final pathology to estimate overall accuracy and accuracy across different lesion types. Potential influencing factors-including lesion location, size, echogenicity, layer of origin, image quality, operator experience and training, and EUS equipment/probe type-will be analyzed to determine independent predictors of diagnostic concordance. The findings are expected to inform optimization of EUS examination and interpretation for colorectal submucosal lesions, thereby improving clinical decision-making and overall quality of care.
Study Type
OBSERVATIONAL
Enrollment
270
Unnamed facility
Shenzhen, Guangdong, China
Coincidence Rate Between Endoscopic Ultrasound Diagnosis and Pathological Diagnosis
For each included lesion with histopathologic confirmation, the preoperative endoscopic ultrasound (EUS) diagnosis will be compared with the final pathological diagnosis. The coincidence rate will be calculated as the proportion of lesions in which the EUS diagnosis is concordant with the pathological diagnosis (number of concordant diagnoses divided by the total number of lesions assessed) during the study period.
Time frame: At the time of preoperative EUS and postoperative pathological evaluation (Day 0).
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