Anal cancer MRI

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mohamad Alkateb, MBBCh [2]

Pelvic MRI may be diagnostic of anal cancer.

MRI is the gold standard for the diagnosis of anal cancer. ^[1] Common findings include:

• T1: primary and recurrent tumours have low to intermediate signal intensity in comparison to skeletal muscle
• T2: primary and recurrent tumours have high signal intensity in comparison to skeletal muscle
• Nodal metastases have similar signal intensity to the primary tumour

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