Hope this helps explain the stages
, I found this explaination:
"The biopsy is graded by two scoring systems. Both the degree of scarring (known as the "stage" of liver
disease) and the degree of inflammation (known as the "grade" of disease) are noted. There are four stages
. Stage 1 refers to a minimal amount of scarring, limited to an area of the liver
known as the portal triad (where the arteries, veins and bile ducts are found).