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| | Myeloproliferative disorders: 101983 (Site not responding. Last check: 2007-10-13) |
 | | The myeloproliferative disorders consist of polycythemia vera, chronic myelogenous leukemia, agnogenic myeloid metaplasia, and essential thrombocythemia. |
 | | As distinguished from chronic myelogenous leukemia, agnogenic myeloid metaplasia usually presents with a white blood cell count less than 30,000 per cubic millimeter, prominent teardrops on peripheral smear, normocellular or hypocellular marrow with moderate to marked fibrosis, and an absence of the Philadelphia (Ph') chromosome or the bcr-abl translocation. |
 | | In addition to the clonal proliferation of a multipotent hematopoietic progenitor cell, an event common to all chronic myeloproliferative disorders, myeloid metaplasia is characterized by colonization of extramedullary sites (such as the spleen or liver). |
| www.acor.org /cnet/101983.html (1668 words) |
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