title: Karyotype and molecular cytogenetic studies in polycythemia vera.
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.
authors.affiliation: Laboratoire de Génétique Médicale, Hôpital Jeanne de Flandre, Centre Hospitalier Régional et Universitaire, Lille, 59037, France.
authors.forename: Joris Loup
authors.initials: JL
authors.lastname: Andrieux
authors.forename: Jean Loup
authors.initials: JL
authors.lastname: Demory
mesh_terms: D002478:Cells, Cultured / Q000648:ultrastructure; D002869:Chromosome Aberrations; D002872:Chromosome Deletion; D002882:Chromosomes, Human, Pair 13 / Q000648:ultrastructure; D002890:Chromosomes, Human, Pair 20 / Q000235:genetics / Q000648:ultrastructure; D002898:Chromosomes, Human, Pair 8; D002899:Chromosomes, Human, Pair 9 / Q000235:genetics / Q000648:ultrastructure; D020732:Cytogenetic Analysis; D018450:Disease Progression; D005796:Genes; D006801:Humans; D007621:Karyotyping; D008875:Middle Aged; D022423:Myeloid Cells / Q000648:ultrastructure; D011087:Polycythemia Vera / Q000097:blood / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D055728:Primary Myelofibrosis / Q000235:genetics; D019851:Thrombophilia / Q000209:etiology; D014314:Trisomy