A 52-year-old woman has experienced worsening malaise during the past year. On physical examination, she has mild scleral icterus. There is no ascites or splenomegaly. Serologic test results are positive for IgG anti-HCV and HCV RNA and negative for anti-HAV, HBsAg, ANA, and antimitochondrial antibody. The serum AST level is 88 U/L, and ALT is 94 U/L. Her condition remains stable for months. Which of the following morphologic findings is most likely to be present in this patient’s liver?