Hastrup N, Hamilton-Dutoit S, Ralfkiaer E, Pallesen G
Department of Pathology, Rigshospitalet, University of Copenhagen, Denmark.
Histopathology. 1991 Feb;18(2):99-105. doi: 10.1111/j.1365-2559.1991.tb01451.x.
Haematoxylin and eosin, and Giemsa stained sections from 100 peripheral T-cell lymphomas were examined blind on two occasions by four experienced haematopathologists in order to evaluate the inter- and intra-observer reproducibility of the updated Kiel classification for these malignancies. In all cases, the T-cell phenotype had been established previously in frozen section using a panel of monoclonal antibodies. Analysis by kappa statistics showed poor reproducibility, both overall and for most subtypes, with the exception of large cell anaplastic lymphoma. The distinction between low- and high-grade lymphomas was also unsatisfactory. These results indicate the need for improved precision in the definition of histological categories of peripheral T-cell lymphoma. The reproducibility of the update Kiel classification for peripheral T-cell lymphomas in its present form is inadequate.
