This is another example of severe arteriopathy occuring
as a result of transplantation across ABO blood group
barriers. This section was stained with periodic-acid
Schiff(PAS) reagent, which highlights glycogen and glycoproteins.
Note the PAS positive material, which is IgM, obliterating
the lumena of the hepatic arterial branches in an
ABO incompatible allograft that failed 3 days after