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A 45-yr-old female presented with a rapidly enlarging bony tumor that was eventually identified as a Philadelphia chromosome (Ph1)-positive myeloproliferative disorder with extramedullary blastic transformation. This transformation occurred in the absence of demonstrable chronic or acute leukemic phase. She had no history of a chronic or prodromal illness in spite of a bone marrow biopsy showing myelofibrosis and liver biopsy documenting extramedullary hematopoiesis. This case represents a unique constellation of features of the myeloproliferative syndrome in which the diagnosis was obscure until special stains of the bony tumor and cytogenetic studies were performed.
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The devices with flat polypropylene membranes can be primed simpler and faster, than devices with the capillary membranes or with silicone rubber membranes. These two devices also offer more protection against venous air admixture and leaking of bubbles across the membrane. From hematologic standpoint there was no clear advantage of one particular device over another.
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We treated 11 patients who had Philadelphia-chromosome-positive chronic myelogenous leukemia with natural interferon alpha (human lymphoblastoid interferon; HLBI). HLBI was given at 6-12 X 10(6) u/day i.m. or i.s.c. during induction therapy. Nine patients responded to the treatment, of whom 7 had hematologic remission and 2 had partial remission. Six patients with MDS or hypoplastic leukemia, and 3 patients with overt leukemia from MDS were treated with recombinant interferon gamma (GI-3). GI-3 was given at 0.4 X 10(6) u/m2 of body-surface area per day i.s.c. or i.v. for 4-6 weeks. In 2 patients with RAEB and hypoplastic leukemia, the blast cell count in bone marrow decreased from 8-16% to 2-3% after 4 weeks of administration. In another patient with hypoplastic leukemia, blast cells in the marrow did not decrease, but anemia was improved without transfusion, increasing the bone marrow NCC and erythroblast count. In patients with overt leukemia and CMML, no clinical effect was obtained. Interferons can therefore be offered to patients in a preleukemic state.