Elevated liver enzyme, mrcp indicated mild intrahepatic ductal dilatation, mild splenomegaly, normal ercp, what causes that, how it treated?

Inflammation. Ductal dilation can be obstructive or non obstructive. Causes of obstruction such as stones, stricture, tumor etc to be ruled out. Usually when not obstructed mild dilation can be related to inflammation or cholangitis. These inflammatory processes usually treated medically.