[Clinical and laboratory study of myleodysplastic syndrome (MDS)/myeloproliferative neoplasm (MPN) with PDGFRß abnormalities].

ABSTRACT

OBJECTIVE: To explore the clinical and laboratory characteristics of myleodysplastic syndrome (MDS)/myeloproliferative neoplasm (MPN) with PDGFRß abnormalities. METHODS: Chromosome specimens were prepared directly and/or short-time culture of bone marrow cells. Karyotyping was performed with R-binding technique. Fluorescence in situ hybridization (FISH) was performed using PDGFRß, PDGFRα, FGFR1 break-apart probes and whole chromosome 5 and 12 painting probes, respectively. The expression of JAK2 V617F was measured with quantitative PCR. RESULTS: The clinical and hematological findings of 27 patients were compatible with diagnosis of MDS/MPN. PDGFRß rearrangement was detected in 4 patients with D-FISH, and 2 of which were confirmed as t(5;12) by chromosome painting. PDGFRα, FGFR1 and JAK2 V617F mutation were not detected in these 4 PDGFRß positive MDS/MPN patients with. CONCLUSIONS: PDGFRß gene rearrangement may be detected in some MDS/MPN patients. FISH is a convenient and reliable approach to detect PDGFRß gene.