Another small duct - large duct question

[Guest guest]

Before joining this group and reading these posts I never heard of

small duct verses large duct PSC.

Since my husband has not had an ERCP yet but the MRCP found:

" There was diffuse stenosis throughout the right main biliary ductal

system extendingd into the secondary branchees. Similarly, there was

abnormal stricturing withing the left main bile duct extending into

the secondary branches. There was a focal stricture of the common

hapatic duct. "

Would that indicate it is large duct PSC?