Rearrangements of the PDGFRa (4q12), PDGFRb (5q32), FGFR1 (8p11), JAK2 (9p24.1) genes are detected by fluorescence in situ hybridization (FISH).

Rearrangements of the PDGFRA (4q12), PDGFRB (5q32), and FGFR1 (8p11) genes are detected by fluorescence in situ hybridization (FISH).