Computerized measurement of iron in liver biopsies: a comparison with biochemical iron measurement.

The measurement of stainable hepatic iron using a microcomputer image analysis system was compared with standard biochemical measurements of liver iron content in 103 liver biopsy specimens--29 of idiopathic hemochromatosis, 51 of alcoholic liver disease and 23 of various nonalcoholic liver diseases. Sections were stained using Perls' method for iron; the mean area staining positively for iron was measured and expressed as a percentage of the area of biopsy measured. Biochemical (biochemical hepatic iron [mumol/gm dry wt]/age) and morphometrical (morphometrical hepatic iron [%]/age x 100) hepatic iron indices were calculated. Patients in the idiopathic hemochromatosis group had significantly higher biochemical hepatic iron concentrations (p less than 0.001) compared with the alcoholic liver disease and nonalcoholic liver disease groups: 284 (range = 119 to 631), 21 (range = 2 to 65) and 15 (range = 3 to 31) mumol/gm dry wt, respectively. The biochemical hepatic iron index was also significantly higher (p less than 0.001) in the hemochromatosis group compared with the alcoholic liver disease and nonalcoholic liver disease groups: 5.8 (range = 2.1 to 13.7), 0.4 (range = 0 to 1.6) and 0.4 (range = 0 to 1.1), respectively. Computerized measurements were significantly higher in the hemochromatosis group (p less than 0.001) compared with the alcoholic liver disease and nonalcoholic liver disease groups: 9.72% (range = 1.50% to 29.26%), 0.13% (range = 0% to 1.20%) and 0.03% (range = 0% to 0.40%), respectively.(ABSTRACT TRUNCATED AT 250 WORDS)