Linear-array Endoscopic Ultrasound and Narrow-Banding Imaging Measure the Invasion Depth of Nonpedunculated Rectal Lesions with Comparable Accuracy based on a Randomized Controlled Trial.

Linear EUS and NBI measure the invasion depth of NPRLs with comparable accuracy. The combination of the two methods does not improve the diagnostic accuracy. Single NBI should be preferred, considering its simplicity and convenience in clinical practice.