The 17q isobaric chromosome is the most common isobaric chromosome found in tumors with a very poor prognosis;

Isolated chromosome i(17q) is often seen in accelerated or acute stages of chronic granulocytic leukemia, acute myeloid leukemia (AML), and myelodysplastic syndromes (MDS), but is often accompanied by other chromosomal abnormalities;

Isolated i (17q) chromosomal abnormalities are very rare in hematologic neoplasms, are seen mainly in myeloid tumors, and may have a poorer prognosis.