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Profile of vemurafenib-induced severe skin toxicities

L Peuvrel1, G Quéreux1, M Saint-Jean1

  • 1Department of Dermatology, Nantes University Hospital, INSERM U892-CNRS U6299, CIC Biothérapie INSERM 0503, Nantes, France.

Journal of the European Academy of Dermatology and Venereology : JEADV
|November 3, 2015
PubMed
Abstract

Insights

Severe skin toxicity from vemurafenib (a BRAF inhibitor) in melanoma patients was linked to longer survival. While some severe reactions necessitate permanent discontinuation, others may allow retreatment with dose adjustments.

Area of Science:

  • Oncology
  • Dermatology
  • Pharmacology

Background:

  • Vemurafenib, a BRAF inhibitor, is frequently associated with skin toxicities.
  • The clinical impact of severe skin toxicity during vemurafenib treatment remains unclear.

Purpose of the Study:

  • To ascertain the rate of permanent vemurafenib discontinuation due to grade 3-4 skin toxicity.
  • To characterize severe skin toxicities, their recurrence after switching to dabrafenib, and their effect on overall survival.

Main Methods:

  • Retrospective cohort study of 131 melanoma patients treated with vemurafenib.
  • Data collection on skin toxicities, treatment adjustments, and outcomes after switching to dabrafenib.
  • Conditional landmark analysis was employed for survival assessment.

Main Results:

  • 26% of patients developed grade 3-4 skin toxicity, leading to permanent discontinuation in 44% of these cases.
  • Severe rashes, including Stevens-Johnson syndrome and DRESS, were the primary reasons for discontinuation.
  • Severe skin toxicity emerging early (within 4-8 weeks) was associated with significantly prolonged overall survival.

Conclusions:

  • Vemurafenib can be continued in 56% of patients with grade 3-4 skin toxicity, particularly when it emerges early, correlating with improved survival.
  • Severe skin reactions may contraindicate vemurafenib, but other rashes warrant dose reduction and retreatment attempts.
  • Dabrafenib is a viable option for managing recurrent skin toxicity.

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