Thank you for citing research, scorpion. It makes discussion much easier. Cece was right, in Budd-Chiari--the first paper you linked:
Prognosis
Without treatment, most patients with complete venous obstruction die of liver failure within 3 yr. For patients with incomplete obstruction, the course varies.
Complete obstruction is very, very different than incomplete. If you had two completely blocked jugular veins and no collaterals, you wouldn't be around for very long.
Now, the second paper you linked to was regarding polycystic liver disease, a very different scenario than Budd-Chiari. Not the same...
Polycystic liver disease (PLD) is a unique clinical problem frequently associated with autosomal dominant polycystic kidney disease (ADPKD).1,2 Most patients with PLD do not require intervention for their liver cysts
Again, please read Dr. B.B. Lee's paper on the likening of Budd Chiari to CCSVI. He is referring to a scenario like the incomplete obstruction of the hepatic veins created by webs and other malformations. He explains it better than I can-
cheer