Patterns of liver injury not thought to be rejection or obstruction. a, Focal areas of necrosis, OT 69. Hematoxylin and eosin, ×60. b, Acute venous congestion, OT 17. Hematoxylin and eosin, ×60. c, Centrilobular cholestasis with bile thrombi, OT 97. There was no evidence of large duct obstruction, drug toxicity or rejection in this patient. Hematoxylin and eosin, ×200. d, Diffuse fatty infiltration of hepatocytes, OT 94. Frozen section stained with Sudan IV, ×60.