The hallmark of chronic myeloid leukemia (CML). The Ph chromosome is an abbreviated chromosome #22 that was shortchanged in an exchange with chromosome #9. This exchange (a translocation) occurs in a bone marrow cell and causes CML.
PHILADELPHIA CHROMOSOME (PH)
Meaning of PHILADELPHIA CHROMOSOME (PH) in English
English dictionary of medicine. Английский словарь медицины. 2012