Abstract
Two cases were reported as showing development of obstructive icterus due to focal fat necrosis around the common bile duct in fattening Japanese Black cattle. Case 1 was 31 month of age, and Case 2 was 34 month of age, both of which showed clear icterus on visible mucosae during the first medical examination. In their blood tests, each case showed an increase in the total amount of bilirubin caused by the increase in the direct bilirubin, and the symptoms of obstructive icterus, such as an increase in γ-GTP activity. The serum vitamin A and β-carotin in each case was low, and Case 2 showed a high rate of amylase and lipase. Pathologically, each of these cases showed some fat necrosis focalized around the common bile duct. These cases were diagnosed as obstructive icterum caused by fat necrosis.
