1. Karyotype and molecular cytogenetic studies in polycythemia vera.
- Author
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Andrieux JL and Demory JL
- Subjects
- Cells, Cultured ultrastructure, Chromosome Deletion, Chromosomes, Human, Pair 13 ultrastructure, Chromosomes, Human, Pair 20 genetics, Chromosomes, Human, Pair 20 ultrastructure, Chromosomes, Human, Pair 8, Chromosomes, Human, Pair 9 genetics, Chromosomes, Human, Pair 9 ultrastructure, Disease Progression, Genes, Humans, Middle Aged, Myeloid Cells ultrastructure, Polycythemia Vera blood, Polycythemia Vera epidemiology, Polycythemia Vera pathology, Primary Myelofibrosis genetics, Thrombophilia etiology, Trisomy, Chromosome Aberrations, Cytogenetic Analysis, Karyotyping, Polycythemia Vera genetics
- Abstract
A minority of patients with newly diagnosed polycythemia vera (PV) have an abnormal karyotype in their myeloid cells but no invariant chromosomal aberration has been found. The most frequent visible alteration is a 20q deletion, also characterized in other myeloproliferative diseases (MPD) and myeloid malignancies; among other chromosomal changes, trisomy 9 appears more common in PV than in other MPDs. When a myelofibrosis complicates the course of the disease, cytogenetic anomalies become quite common with a striking frequency of partial duplication 1q; an evolution towards myelodysplasia or acute leukemia is almost always associated with nonspecific chromosomal aberrations. Modern cytogenetic methods have disclosed cryptic anomalies and pointed out the high frequency of 9p alterations affecting a restricted region, thus stimulating an active search for candidate genes or specific mutations.
- Published
- 2005