Abstract
A study was conducted to assess the inter and intrarater agreement for the histopathologic features and diagnosis of chronic rejection (CR) and several other important causes of late liver allograft dysfunction. On two occasions, five pathologists, experienced with liver transplantation, reviewed a set of 49 slides representing a range of diagnoses, without knowledge of the clinical history or liver injury test results. The readings were correlated with the original histopathologic diagnosis, liver injury tests, and clinicopathologic follow-up. Assessment of biopsy adequacy (kappa = 0.69) and portal tract counts (kappa = 0.79) showed good to excellent intrarater agreement, whereas interrater agreement for these variables was moderate to good, respectively (kappa = 0.44 and 0.65). Likewise, the intrarater agreement for the diagnosis of CR (kappa = 0.68), hepatitis (kappa = 0.77), and obstructive cholangiopathy (kappa = 0.55) showed good to excellent agreement, whereas the interrater agreement for these same diagnoses ranged from fair to good (kappa = 0.58, 0.46, and 0.25, respectively). In 18 specimens, there was a near unanimous diagnosis of CR across both readings. These biopsies were obtained at a median of 7.1 months (range,...Continue Reading
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