pathologic primary tumor stage for kidney according to AJCC 7th edition metadata complete pT3a (kidney) Chris Stoeckert, Helena Ellis pT3a (kidney) A pathologic primary tumor stage for kidney according to AJCC 7th edition indicating that the tumor grossly extends into the renal vein or its segmental (muscle containing) branches, or the tumor invades perirenal and/or renal sinus fat (peripelvic) fat but not beyond Gerota fascia. https://staging.seer.cancer.gov/tnm/input/1.0/kidney_parenchyma/path_t/ NCI BBRB