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Uptodate Reference Title
Depiction of T4a lesions and the importance of the circumferential margin*
Depiction of T4a lesions and the importance of the circumferential margin*
* In portions of the colorectum that are not peritonealized (eg, posterior aspects of the ascending and descending colon, lower portion of the rectum), the pT4a category is not applicable.
Used with permission of the American College of Surgeons, Chicago, Illinois. The original source for this information is the AJCC Cancer Staging Manual, Eighth Edition (2017) published by Springer International Publishing.
