Acute Myeloid Leukemia (AML) is challenging disease to treat and quite distinctly different from its cousin, acute lymphoblastic leukemia (ALL).  The first is more common in adults, while the second is more prevalent in children.  Success rates with pediatric ALL have far outstripped what we have achieved with adults in AML to date, partly due to the elderly nature of the disease making for poorer outcomes with stem cell transplants (SCT), as well as increased clonal heterogeneity and cytogenetic complexity with age.

Quite a few FLT3 inhibitors have come and gone over the years – many keen observers will remember Cephalon’s (now Teva) TKI called CEP-701, which was tested in relapsed/refractory disease and Elderly AML, for example, and slid off largely unnoticed to dog drug heaven.

How much does clinical trial design impact a drug’s success or failure?

Sometimes quite a bit, as this story with midostaurin demonstrates; limited activity in advanced disease but much more dramatic results in the upfront setting.  Clearly, sometimes testing drugs in later disease does not predict their future performance elsewhere!

To put more colour on the data presented at ASH, we interviewed a thought leader in adult AML for his perspective on the FLT3 R&D developments.

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