MR Imaging of Anal Cancer.

Authors

Peter M Young, Jennifer S Golia Pernicka, Andrew B Jing, Randy D Ernst, Gaiane M Rauch

Published in

Magnetic resonance imaging clinics of North America. Volume 34. Issue 4. Pages 649-662. Epub Jul 20, 2026.

Abstract

High-resolution pelvic MR imaging is central to the diagnosis, staging, treatment planning, and posttreatment assessment of anal squamous cell carcinoma (SCCA), the most common malignancy of the anal canal. Accurate imaging interpretation requires detailed knowledge of anal canal anatomy, lymphatic drainage, and optimized MR imaging technique. MR imaging provides excellent evaluation of primary tumor extent, while nodal and distant staging are enhanced by computed tomography (CT) and FDG-PET/CT. Imaging directly informs contemporary chemoradiation strategies and surveillance. Human papillomavirus (HPV) is implicated in nearly 90% of SCCA, is vaccine-preventable, and HPV ctDNA shows promise for response assessment and relapse prediction.

PMID:
42855208
Bibliographic data and abstract were imported from PubMed on 10 Oct 2026.

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