['To identify pre-therapeutic predictors of sustained virological response (SVR) in Taiwanese patients with chronic hepatitis C.', 'One hundred and ninety-eight consecutive patients receiving interferon plus ribavirin combination therapy were included. Stepwise logistic regression model was performed to estimate the SVR on the presence of various pre-therapeutic clinical parameters.', 'The difference of alanine aminotransferase and aspartate aminotransferase levels (beta = 0.0080, P=0.0151), the presence of genotype 1b (beta = -1.9225, P<0.0001), the presence of dense packing of inflammatory cells in portal tract (beta = 1.5239, P=0.0354), age (beta = -0.0441, P=0.0179) and pre-therapeutic HCV-RNA concentration (beta = -0.0682, P=0.0411) were identified as independent predictors in the regression analysis. Patients with dense packing of inflammatory cells in portal tract (n=21) had significantly higher aspartate aminotransferase concentration, higher histology activity index, higher fibrosis score, and more histologically cirrhosis (P=0.032, 0.0001, 0.034, and 0.020, respectively). Paradoxically, they had a higher chance to achieve SVR (18/21 (85.7%) versus 99/177 (55.9%); P=0.017).'] Does dense packing of portal lymphocytes predict favorable treatment outcome in hepatitis C?