Task: Instance Description Understanding (ontology: Sciences/Computer_Science)

Which of the following definitions best describes the instance 'pT3a (kidney)'?

A. 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.
B. A pathologic primary tumor stage for kidney according to AJCC 7th edition indicating that the tumor invades beyond Gerota fascia (including contiguous extension into the ipsilateral adrenal gland).
C. A pathologic primary tumor stage for kidney according to AJCC 7th edition indicating that the tumor is more than 7 cm but not more than 10 cm.
D. A pathologic primary tumor stage for kidney according to AJCC 7th edition indicating that the tumor extends into major veins or perinephric tissues but not into the ipsilateral adrenal gland and not beyond the Gerota fascia.

Answer: 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.