Centrilobular necrosis after orthotopic liver transplantation: A longitudinal clinicopathologic study in 71 patients

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Abstract
Centrilobular necrosis (CLN) is a histological finding often encountered after orthotopic liver transplantation, but its pathogenesis is still unknown. In this study, the significance of CLN was assessed in a series of 227 consecutive liver transplantations performed between January 1989, and December 1991. Seventy‐one patients (30.9%) showed CLN on at least one biopsy result, which were obtained because of an increase of aspartate aminotransferase activity. Their liver specimens were reviewed, and 19 histological features were recorded with particular attention given to lobular changes in acinar zone 3, to features commonly attributed to cellular and ductopenic rejection, and to changes suggestive of ischemia. CLN could first be observed either soon (within 4 days) or late (up to 3 years) after transplantation. Only 23 (32.4%) specimens had centrilobular necrosis affecting more than 75% of acinar zones 3. In 60 cases (84.5%) the lesion was limited to acinar zone 3. An important associated feature was sinusoidal congestion in 73.2% of cases. Fifty‐one of 71 patients (71.8%) had histological features of cellular rejection before or at the time of CLN, and 13 of these progressed to ductopenic rejection versus 3 of the 156 patients without CLN (P < 0.0001). Nine patients had a recurrence of CLN, of whom 2 progressed to ductopenic rejection, a recurrence rate of 16.7% in this series. The survival of patients with CLN is worsened by associated ductopenic portal tracts compared with those without ductopenia (P = 0.0189‐MantelCox). This histological combination, irrespective of the serum bilirubin level, may warrant an early conversion to FK506‐based immunosuppression.