What is it about?

DPD testing has been implemented and applied in routine in >210 head and neck cancer patients scheduled for a 5-FU-based therapy. When DPD defiency was detected using a simple functional testing, 5-FU dosing was reduced accordingly. DPD deficient patients had an average 20% cut in dosing (range 15-50%) as compared with other patients. Despite this reduction in dosing, no difference was oberved in response rates between the groups. Overall, less than 10% of early severe toxicities were observed, a value markedly lower than the figures usually reported in head and neck cancer patients.

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Why is it important?

This study demonstrates that implementing routine DPD testing is feasible in medical oncology and clinically relevant to limit the risk of severe toxicities in 5-FU patients. Importantly, cut in dosing did not impede treatment efficacy.

Perspectives

This study calls for a generalization of routine DPD-testing as a means to secure the administration of 5-FU.

joseph ciccolini
Aix-Marseille Universite

Read the Original

This page is a summary of: Upfront DPD Deficiency Detection to Secure 5-FU Administration: Part 2- Application to Head-and-Neck Cancer Patients, Clinical Cancer Drugs, January 2018, Bentham Science Publishers,
DOI: 10.2174/2212697x04666170817123425.
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