The paradox of 20q11.21 amplification in a subset of cases of myeloid malignancy with chromosome 20 deletion

Deletion of the long arm of one chromosome 20 (del(20q)) is a well‐recognized abnormality in acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) and is presumed to cause loss of a tumor suppressor gene at 20q12. In a previously published series of MDS and AML cases, which had lost this...

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