Monoclonal Blast Cell Proliferation in Transient Myeloproliferative Disorder
نویسندگان
چکیده
Transient myeloproliferative disorder is a hematological condition observed during the neonatal period in patients with Down syndrome [1]. This disorder mimics congenital leukemia and the blast cells were often reported to show characteristics compatible with those of megakaryoblasts [2] or pluripotent stem cells [3]. Although this disorder usually resolves gradually without antileukemic treatment, in some patients, leukemia develops after periods of spontaneous remission [4], raising questions about the benign origin of this disorder. It is therefore unclear if transient myeloproliferative disorder is a leukemia, preleukemia, or transient dysplasia of myelopoiesis. This important issue might be resolved by analysis of the clonality of the blast cells of this disorder. We therefore studied the clonality of blast cells in transient myeloproliferative disorder
منابع مشابه
Cytogenetic findings and clinical features in acute leukemia and transient myeloproliferative disorder in Down's syndrome.
Cytogenetic, immunologic, and electron microscopic studies were performed on the blast cells of 28 pediatric patients with Down's syndrome, 13 with acute leukemia (DS-AL) and 15 with transient myeloproliferative disorders (DS-TMD). Clonal chromosome abnormalities were found in the cells of all patients with DS-AL but not those with DS-TMD. The younger ages and higher hemoglobin concentrations, ...
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Neonates with Down’s syndrome occasionally show an excess of blasts in their peripheral blood. This disorder spontaneously resolves within several months and is called transient abnormal myelopoiesis (TAM) or transient myeloproliferative disorder. It has been uncertain whether the excess of blasts in TAM is a result of a clonal proliferation or a polyclonal reactive condition. The clonality of ...
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Transient myeloproliferative disorder (TMD), an acute leukemia-like disorder in neonates with Down's syndrome, is characterized by spontaneous regression of abnormal blast growth. Because proliferating blasts frequently express phenotypes of megakaryocytic lineage and, as a result, this disorder resembles acute megakaryoblastic leukemia (AMKL), it would be of interest to determine whether myelo...
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Neonates with Down's syndrome occasionally show an excess of blasts in their peripheral blood. This disorder spontaneously resolves within several months and is called transient abnormal myelopoiesis (TAM) or transient myeloproliferative disorder. It has been uncertain whether the excess of blasts in TAM is a result of a clonal proliferation or a polyclonal reactive condition. The clonality of ...
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