Abstract
From the viewpoint of the pathologist, there are three major issues concerning Hodgkin's disease (HD) that must be addressed. First is making the correct diagnosis; second is identifying any pathological features that may be of prognostic importance; and third is defining the identity of the neoplastic cell. Since Hodgkin's disease (HD) was first described, the origin of the Reed-Sternberg cell and the pathogenesis of HD have remained elusive. Recently developed techniques have allowed investigators to analyze the immunophenotype and genotype of Reed-Sternberg cells. The results of these studies include recognition that, in many cases, Reed-Sternberg cells are of lymphoid origin. Thus, although in most cases of HD the diagnosis is straightforward on routinely stained sections, the conceptual dividing line between HD and non-Hodgkin's lymphoma is not as sharp as it once seemed. Occasionally, there is difficulty in distinguishing between HD and non-Hodgkin's lymphoma. Nevertheless, fundamental differences in the clinical features, histology, immunophenotype, and genotype between non-Hodgkin's lymphoma and HD remain. The impact of histological features on prognosis are controversial, largely because of the excellent prognosis of most cases of HD.
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