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Table 5. Pathologic (pT)a,b

pT2Organ confined.
pT2aUnilateral, ≤½ of one side.
pT2bUnilateral, involving >½ of side but not both sides.
pT2cBilateral disease.
pT3Extraprostatic extension.
pT3aExtraprostatic extension or microscopic invasion of bladder neck.b
pT3bSeminal vesicle invasion.
pT4Invasion of rectum, levator muscles, and/or pelvic wall.

p = Pathologic; T = Primary tumor.
Reprinted with permission from AJCC: Prostate. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 457-68.
aThere is no pathologic T1 classification.
bPositive surgical margin should be indicated by an R1 descriptor (residual microscopic disease).