Long‐term remission after intensive chemotherapy in advanced myelodysplastic syndromes is generally associated with restoration of polyclonal haemopoiesis
2000
The clonality of peripheral blood cells was assessed in eight female patients with myelodysplastic syndrome (MDS) by means of the human androgen receptor gene-based assay (HUMARA). The patients were in complete remission for a median follow-up time of 83 months after intensive chemotherapy. X-chromosome inactivation patterns (XCIPs) indicated polyclonal haemopoiesis in five patients. Two patients had skewed lyonization (i.e. unbalanced XCIPs in both granulocytes and T cells) and one patient presented monoclonal granulocytes together with polyclonal T cells. We conclude that long-term remission in MDS following intensive chemotherapy is usually associated with polyclonal haemopoiesis.
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