Final answer:
Tricuspid stenosis is not a cause of obstruction seen in Budd-Chiari syndrome, which is an obstruction of the hepatic vein mainly due to thrombosis, tumors, or congenital abnormalities.
Step-by-step explanation:
The condition that is not a cause of obstruction seen in Budd-Chiari syndrome is tricuspid stenosis. Budd-Chiari syndrome is characterized by the obstruction of the hepatic vein, which can be caused by vessel thrombosis, tumor infiltration, or a congenital web. Tricuspid stenosis pertains to the narrowing of the tricuspid valve of the heart and does not directly obstruct the hepatic vein. Therefore, while tricuspid stenosis may lead to other complications, it is not considered a cause of obstruction in Budd-Chiari syndrome.