Isodicentric X Chromosome in Myeloproliferative Disorders

Abstract
Two further cases of acquired isodicentric (X)(q13) chromosome in patients with myeloproliferative disorders are reported. One patient had a primary myelofibrosis and the other a chronic myelogenous leukemia. DNA replication study demonstrated that both abnormal X chromosomes were late replicating in all cells examined. The inactive condition of idic(X)(q13) seems to be indicative of a selective advantage for a cell carrying this alteration.

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