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CASE
DW-MRI
Lesion at the anorectal verge, posteriorly and laterally located (left side)
Close proximity of the internal anal sphincter without invasion of the external
sphincter
Necrotic, partly confluent nodes with extracapsular extension around the
right internal iliac vessels
18
F-FDG PET/CT
Hypermetabolic lesion in the anal canal
Hypermetabolic nodes at the right internal iliac vessels
No hematogenous metastases