case_images: PMC11752465_01
case_images: Endoscopic image at initial presentation. A: A 20-mm elevated lesion on the left wall of the anal canal; B: The number represents the cross section, and the tumor is identified by the yellow line. But the specimen was removed in two sections. Therefore, it was difficult to evaluate.
case_images: 101119-g001.jpg
case_images: PMC11752465_01_101119-g001.jpg
case_images: F1
case_images: The oral side extended slightly beyond the Hermann line into the rectum (Figure 1A).