ARG1 and metabolic dysfunction-associated steatohepatitis: In the specimens of 20 NASH HCC patients examined, ARG1 was negative in 5 (25% (score 0)), weakly-expressed in 11 (55% (score 1+)), moderately expressed in 3 (15% (score 2+)), and strongly-expressed in only 1 (5% (score 3+)) (Figure 4C,D).