Table 10.

Nonalcoholic Steatohepatitis Clinical Research Network Staging System (NASH-CRN)

Stage		Description
1
	A	Pericentral sinusoidal fibrosis, mild (but detectable with collagen stains)
	B	Pericentral sinusoidal fibrosis, prominent (noticeable on Hematoxylin and Eosin stained sections)
	C	Portal fibrosis and/or periportal fibrosis
2	Pericentral sinusoidal fibrosis (+) portal/periportal fibrosis
3	Bridging fibrosis (central-central, central-portal, portal-portal)
4	Cirrhosis (incomplete or complete)