petrosal vein

pe·tro·sal vein

a tributary of the superior petrosal sinus that receives venous channels from the midbrain, pons, and the lateral portions of the anterior lobe of the cerebellum.
References in periodicals archive ?
The superior petrosal vein mainly collects venous blood from cerebellar hemisphere and lateral pons.
Since petrosal vein sampling was negative, another source of ACTH was sought.