Severe toxicity of capecitabine in a patient with DPD deficiency after a safe FEC-100 experience: why we should test DPD deficiency in all patients before high-dose fluoropyrimidines.

We report the case of a 44-year-old patient who experienced severe toxicity while being treated with capecitabine at standard dose for metastatic breast cancer. As the patient had already received 5-FU within the FEC protocol (5-FU 500 mg/m2, epirubicin 100 mg/m2, and cyclophosphamide 500 mg/m2) 10 years ago without experiencing any severe adverse event, no DPD deficiency testing was performed before capecitabine treatment. Nevertheless, she experienced severe diarrhea and grade 2 hand-foot syndrome from the first cycle, forcing her to stop the treatment. Phenotypic and genotypic investigation of DPD activity revealed that the patient had a partial deficiency and had therefore been exposed to a higher risk of developing severe toxicities on fluoropyrimidines. This case proves that tolerance to low-dose fluoropyrimidines does not preclude DPD deficiency and the occurrence of severe toxicities if higher doses of fluoropyrimidines are used as a second-line treatment. It emphasizes the role of DPD phenotyping testing based on uracilemia in patients scheduled for fluoropyrimidine drugs, even if previous courses with low-dose 5-FU were safely administered.

[Antineoplastic drug induced nausea and vomiting: What is the clinical practice in 2018? An update of AFSOS clinical guidelines]. / Nausées-vomissements induits par les traitements anti-cancéreux (NVITAC) : quelle prise en charge en 2018 ? Mise à jour du référentiel AFSOS.

Antineoplastic drug induced nausea and vomiting (ANDINV) (previously named: Chemotherapy-induced nausea and vomiting [CINV]) are one of the most feared adverse effect for patients who begin treatment with anti-cancer treatments and their bad control have a negative impact in the management of these patients. In this review article, it is proposed an update of French-speaking Association for oncologic supportive care (AFSOS) clinical practice of CINV guidelines. This update became necessary for several reasons: newly available anti-emetic drugs; new data published about individual risk factors of CINV; new antineoplastic agents available; changing in emetic risk levels for some molecules in the international guidelines. To address these guidelines, the various clinical presentations of ANDINV and their intensity classification are discussed. Then, the different therapeutic solutions are presented: classes of conventional drug therapies, complementary therapies and advice to patients. Then, the implementation of primary prophylaxis are presented in four steps: (1) to evaluate the emetic risk level of antineoplastic agent; (2) to set the emetic risk level of antineoplastic protocols; (3) to set types of antiemetic drugs to implement; (4) "Outperform" prophylaxis in case of individual risk factors. Finally, implementation of secondary prophylaxis and rescue treatments are adressed.