Abstract
The histological distinction between Hodgkin's disease (HD) and anaplastic large cell lymphoma (ALCL) may be difficult but is important as the two conditions have different clinical behaviours, prognoses and responses to therapy. Morphological appearances that have been emphasised as favouring the diagnosis of ALCL rather than HD include the identification of neoplastic cells permeating sinusoidal spaces. We document two cases of Hodgkin's disease with classical morphological and immunohistochemical features of nodular-sclerosis subtype (HDNS) but with striking sinusoidal involvement by neoplastic cells. In each case, the CD30 positive/CD15 positive immunophenotype of the neoplastic cells was characteristic of HD without expression of any of the other antigens normally associated with ALCL. HD is generally considered to be a morphological diagnosis and, in those laboratories in which it is not possible to use wide panels of antibodies for the confirmation of the diagnosis, the identification of sinusoidal infiltration by the neoplastic cells in HD may lead to the mistaken impression of ALCL.
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Rodriguez-Justo, M., Fisher, T. & Wotherspoon, A. Hodgkin's disease with an intrasinusoidal pattern of infiltration. Virchows Arch 439, 691–696 (2001). https://doi.org/10.1007/s004280100471
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DOI: https://doi.org/10.1007/s004280100471