In separate studies from the UK Leukemia Research Fund CLL 4 trial, patients with ATM mutations treated with chemotherapy exhibited shorter progression-free survival (PFS) and overall survival (OS) compared to ATM- wildtype patients, though the differences did not reach statistical significance [ 7 , 17 ].
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ATM aberrations in chronic lymphocytic leukemia: del(11q) rather than ATM mutations is an adverse-prognostic biomarker.
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Notably, del(11q) was a highly significant marker for TTFT, adding similar risk as SF3B1 mutations or TP53 abnormalities.