PMC4881242_01
Anal canal endoscopy (reverse observation). Elevated lesion is observed on Herrmann's line of the anus.
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F1
Lower gastrointestinal endoscopy identified an elevated lesion centered on Herrmann's line in the anus (fig. 1).
Pelvic computer tomography. a Mucosal thickening with contrast effect is observed in the rectum (arrow). b Swelling of the right inguinal lymph node is noted (arrow).
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F2
Pelvic computed tomography (CT) (fig. 2) revealed mucosal thickening with a contrast effect in the rectum, as well as swelling of the right inguinal lymph node and pararectal lymph nodes.
Pelvic magnetic resonance imaging (sagittal plane). Wall thickening with gadolinium enhancement is seen in the rectum (Rb-P). No infiltration beyond the outer membrane of the rectum is observed.
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F3
Pelvic magnetic resonance imaging (fig. 3) also confirmed wall thickening with gadolinium enhancement in the rectum (Rb-P), which was consistent with the pelvic CT finding.