Shanna Matalon MD, Presenter: Nothing to Disclose

Sreeharsha Tirumani MBBS, MD, Abstract Co-Author: Nothing to Disclose

Harvey Mamon MD, PhD, Abstract Co-Author: Nothing to Disclose

Nikhil H. Ramaiya MD, Abstract Co-Author: Nothing to Disclose

Michael Hayden Rosenthal MD, PhD, Abstract Co-Author: Nothing to Disclose

1. Anatomic distinctions in the pelvis and perineum, such as the difference between mesorectal and internal iliac lymph nodes, can dramatically alter the staging and treatment of anorectal malignancies. 2. High rectal, low rectal, and anal cancers demonstrate different patterns of local, regional, and systemic dissemination. 3. Accurate reporting of the locations of suspicious lymph nodes is critical to the planning and delivery of radiation therapy.

-Anatomy of the anus, rectum, perineum, and pelvic nodal stations as seen on CT and MRI. -Key anatomic landmarks from the anal margin to the rectosigmoid junction. -Common histologic types of cancer that are found in each anatomic location with associated demographics and risk factors. -TNM staging for anal and rectal cancers, with emphasis on the key distinctions between these two sites (e.g., differing definitions of regional lymph nodes, most notably the internal iliac and inguinal nodal stations). -Roles of CT, MRI, and PET-CT in the initial staging of anorectal cancers and in radiation treatment planning.

http://abstract.rsna.org/uploads/2014/14015534/14015534_4wvl.pdf

Matalon, S, Tirumani, S, Mamon, H, Ramaiya, N, Rosenthal, M, What Radiologists Need to Know and What Radiation Oncologists Want to Know about Anorectal Cancers: Critical Anatomic and Staging Distinctions that Affect the Use of Radiation Therapy for Anorectal Malignancies.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14015534.html