Material de interés para complementar información:
http://www.nature.com/modpathol/journal/v27/n1/full/modpathol2013124a.html
Prognostic significance of tumor budding in rectal cancer biopsies before neoadjuvant therapy
Prognostic and Predictive Biomolecular Markers in Rectal Cancer
http://omicsonline.org/2155-9619/pdfdownload.php?download=2155-9619-S2-006.pdf
Tumor Regression Grading in Rectal Cancer: Is It
Time to Move Forward?
http://jco.ascopubs.org/content/32/15/1534.full.pdf+html---------------------------------------------------------------------------------------------