NCIt definition : A pathologic primary tumor TNM finding. The definition of pT2 finding depends on the
particular type of cancer that it refers to; for example, for breast cancer, pT2 finding
is defined as follows: cancer with tumor size more than 2.0 cm, but not more than
5.0 cm in greatest dimension; for colorectal cancer, pT2 finding is defined as follows:
cancer with invasion into the muscularis propria. (from AJCC 6th and 7th Eds.);