HMGA2 and neoplasm: However, when fluorescence in situ hybridization (FISH) was performed on fresh-frozen tumor sections or exponentially growing fibroid cell cultures of samples identified as HMGA2hi, 12q14-15 rearrangement was not detected in either GO535F1 or MP120F2 with probes spanning over 600 kb upstream of HMGA2 (Figures S6A and S6B).