Extra translocation +der(1q9p) is a prognostic indicator in myeloproliferative disorders.
Rege-Cambrin G, Speleman F, Kerim S, Scaravaglio P, Carozzi F, Dal Cin P, Michaux JL, Offner F, Saglio G, Van den Berghe H. Extra translocation +der(1q9p) is a prognostic indicator in myeloproliferative disorders. Leukemia. 1991 Dec; 5(12):1059-63.