Hodgkin disease type is a major determinant of prognosis

Regional differences in the survival of Hodgkin disease (HD) can be partially explained by the type of HD, according to a new population level study. Published in the July 15, 2006 issue of CANCER (http://www.interscience.wiley.com/cancer-newsroom), a peer-reviewed journal of the American Cancer Society, the study reveals that while nodular sclerosis was much more common in the United States than Europe, there was significant HD variability across Europe. Furthermore, HD type (or morphology) accounted for differences between the U.S. and most of Europe, except Eastern Europe. The study also supported data that HD with lymphocyte predominance had the best prognosis and HD with lymphocytic depletion had the worst.

HD is a malignancy of the lymphatic system of the body, which includes lymph nodes and the spleen. Like many cancers, HD comes in multiple morphologies based on cellular characteristics. Studies have shown that certain morphologies have worse prognoses. However, treatment regimens, particularly the newer generation of chemotherapy and radiation protocols, are generally successful at curing the disease.

In spite of this, a recent study of European cancer registries showed significant geographic differences in the survival of blood-borne cancers, such as HD. In order to understand the causes of these regional differences, Claudia Allemani, Ph.D. of the Istituto Nazionale per lo Studio e la Cura dei Tumori in Milan, Italy and the EUROCARE Working Group compared 6,726 cases from 37 cancer registries in Europe (EUROCARE-UK, EUROCARE-west, and EUROCARE-east) and 3,442 cases from 9 U.S. (SEER) registries diagnosed between 1990 and 1994 and followed at least for five years.

Analysis showed that the distribution of HD types in a region was a major factor in determining regional differences in HD five-year survival and risk of death. Using the relative excess risk (RER) of death t

Contact: David Greenberg
John Wiley & Sons, Inc.

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