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ASH Highlights in Asia ECHO -Chronic Myelogenous Leukemia
Marjorie Bravo, MD
St. Luke’s Medical Center
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• Michael J. Mauro, MD – Memorial Sloan Kettering Cancer Center
• Jorge Cortes, MD – MD Anderson Cancer Center
• Neil P. Shah, MD – University of California
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Case 1
• 57 y/o M business executive referred : abnormal CBC – WBC 121k with 8% basophils, 3% eosinophils, 2%
blasts – Hgb 12, platelets 650k, spleen 4cm below the costal
margin– PMH : hypertension, hyperlipidemia, +FH CAD
– BM performed, 90% cellular, myeloid hyperplasia, megakaryocytic hyperplasia, 1-2 % blasts, minimal basophilia; Karyotype 100% t(9:22), no other abnormalities
– His younger brother is an HLA identical match
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Case 1 choices
• He has researched extensively and asks your thoughts on which is the best first therapy?
– Nilotinib 300mg BID
– Imatinib 400mg OD
– Dasatinib 100mg OD
– Allografting dirrectly
– Bosutinib 400mg OD
– Imatinib 600mg OD
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Case 1 continued
• You and he decide to pursue one of the three TKIs FDA approved for front line use at standard dose. Initial qPCR revealed a level of 178% on the International scale (IS)
• Hematologic response with minimal myelosuppresionoccurs in month one. He feels well and returns at 3 mos. PB qPCR is repeated, and : – His level of 15% is inadequate and he should change
therapy
– His level of 15% may be adequate and he should be reassessed at 6 mos
– He should have waited until 6 mo for qPCR as 3 mo is too early
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Case 1 continued further
• Given the degree of 3 mo transcript reduction, initial therapy continues and MMR is noted at 12 mo
• After 2 years of treatment he is noted to have a deep molecular response (MR4.5) that is then sustained without significant change through the next 2 years
• He heard in a chat room for CML about treatment free remission trials and he wants to know more
• Also he heard about a newer drug something called “ABL001”, and wants to know anything you can tell him about these.
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Take Home Message
• Dasatinib may be a valid option at first line • There is benefit of monitoring patients earlier
than 3 months in order to optimize therapy • TKIs MAY BE STOPPED! But for a select group
of patients. • There are new agents on the horizon, which
may help us achieve better responses and hopefully cure.
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Thank You!
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