Colony formation by haematopoietic progenitors from the bone marrow and blood of 4 patients with essential thrombocythaemia was studied in vitro using the methyl cellulose assay. 3 patients had clearly elevated numbers of BFU-E in bone marrow. 1 patient also had markedly increased numbers of CFU-E and CFU-GM, whereas the other patients had only marginally increased or normal numbers of these progenitors in the marrow. 3 patients showed markedly increased numbers of all progenitors in peripheral blood. All 4 patients showed spontaneous erythroid colony formation by progenitors from the bone marrow and 2 had spontaneous colony formation by progenitors from the blood. We conclude that essential thrombocythaemia shows abnormal colony formation in line with other myeloproliferative syndromes.
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| http://dx.doi.org/10.1111/j.1600-0609.1983.tb01457.x | DOI Listing |
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