Non-alcoholic fatty liver disease: Is surgery the best current option and can novel endoscopy play a role in the future?

Table 1 illustrates the non-alcoholic fatty liver disease activity scoring system

Group	Definition	Scoring
Steatosis	< 5%	0
	5%-33%	1
	> 33%-66%	2
	> 66%	3
Lobular inflammation	No foci	0
	< 2 foci per 200× field	1
	2-4 foci per 200× field	2
	> 4 foci per 200× field	3
Hepatocyte ballooning	None	0
	Few	1
	Many	2
Fibrosis	No fibrosis	0
	Zone 3 mild perisinusoidal fibrosis	1a
	Zone 3 moderate perisinusoidal fibrosis	1b
	Periportal/portal fibrosis only	1c
	Zone 3+ periportal/portal fibrosis	2
	Bridging fibrosis	3
	Cirrhosis	4

Overview of the components of the non-alcoholic fatty liver disease activity score scoring system.