PMID- 16769584 OWN - NLM STAT- MEDLINE DCOM- 20061005 LR - 20060613 IS - 1592-8721 (Electronic) IS - 0390-6078 (Linking) VI - 91 IP - 6 DP - 2006 Jun TI - A combination of cytomorphology, cytogenetic analysis, fluorescence in situ hybridization and reverse transcriptase polymerase chain reaction for establishing clonality in cases of persisting hypereosinophilia. PG - 817-20 AB - To evaluate the frequency of clonal abnormalities in patients with unexplained persisting eosinophilia we analyzed 40 patients (27 males, 13 females) using cytomorphology, cytogenetic analysis, interphase fluorescence in situ hybridization (FISH), and reverse transcriptase polymerase chain reaction (RT-PCR). Cytogenetic analysis revealed clonal abnormalities in five patients (four of whom were males) including t(8;9)(p21;p24), ins(9;4)(q34;q12q31), del(6)(q24), and trisomy 8 (n=2). RT-PCR confirmed a PCM1-JAK2 fusion underlying the t(8;9). FISH analysis suggested a rearrangement involving PDGFRA in the ins(9;4). A FIP1L1-PDGFRA fusion gene was identified in four male patients by interphase FISH and RT-PCR. These methods in combination demonstrated clonality in 8/40 patients (20%) with a male predominance (6/8; 75%). FAU - Bacher, Ulrike AU - Bacher U AD - Department of Clinical Chemistry, Ludwig-Maximilians-University, Munich Marchioninistr. 15, 81377 Munich. ulrike.bacher@med.uni-muenchen.de FAU - Reiter, Andreas AU - Reiter A FAU - Haferlach, Torsten AU - Haferlach T FAU - Mueller, Lothar AU - Mueller L FAU - Schnittger, Susanne AU - Schnittger S FAU - Kern, Wolfgang AU - Kern W FAU - Schoch, Claudia AU - Schoch C LA - eng PT - Journal Article PL - Italy TA - Haematologica JT - Haematologica JID - 0417435 SB - IM MH - Chromosome Mapping MH - Chromosomes, Human, Pair 8 MH - Chromosomes, Human, Pair 9 MH - Cytogenetic Analysis MH - Female MH - Gene Rearrangement MH - Humans MH - Hypereosinophilic Syndrome/*genetics/*pathology MH - In Situ Hybridization, Fluorescence MH - Male MH - Retrospective Studies MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sex Characteristics MH - Translocation, Genetic EDAT- 2006/06/14 09:00 MHDA- 2006/10/06 09:00 CRDT- 2006/06/14 09:00 PHST- 2006/06/14 09:00 [pubmed] PHST- 2006/10/06 09:00 [medline] PHST- 2006/06/14 09:00 [entrez] PST - ppublish SO - Haematologica. 2006 Jun;91(6):817-20.