A tumor of the median lobe of the prostate gland may block the __________ by its uncontrolled growth as well as metastasize to the brain via the ________ plexus of veins.

Answer 1

Blocks the prostatic urethra that's why the patients have bilateral pylelonephrosis.

If it is a cancer, metastasis to the bones first, and if it metastasize to the brain, it would deposit in the infra-tentorium via vertebral venous plexus.

VVP is a venous drainage, that drains all the pelvic organs, that's why a tumor takes that path, deposits in the vertera before the brain.