Testing for BRAF fusions in patients with advanced BRAF/NRAS/KIT wild-type melanomas permits to identify patients who could benefit of anti-MEK targeted therapy.

Testing for BRAF fusions in patients with advanced BRAF/NRAS/KIT wild-type melanomas permits to identify patients who could benefit of anti-MEK targeted therapy.

Publication date: Sep 10, 2019

Beyond targeted therapy for patients with BRAF-mutated melanomas and immunotherapy in patients lacking BRAF mutations, anti-MEK therapy has been proposed in patients with advanced melanomas harbouring BRAF fusions. BRAF fusions diagnosis in patients with advanced melanomas is the subject of the present study. Using BRAF fluorescent in situ hybridisation (FISH), we searched for BRAF fusions in 74 samples of 66 patients with advanced BRAF/NRAS/KIT wild-type melanomas. We identified 2/66 (3%) patients with BRAF fusions in a brain metastasis of one patient and in a lymph node metastasis and in a cutaneous metastasis for the second patient with 90%-95% of tumour nuclei containing isolated 3′-BRAF FISH signals. As a result, we conclude that BRAF FISH in patients with advanced BRAF/NRAS/KIT wild-type melanomas is a valuable and easy-to-perform test to diagnose BRAF fusions and to identify patients who could benefit of anti-MEK targeted therapy.

Le Flahec, G., Briolais, M., Guibourg, B., Lemasson, G., Grippari, J.L., Led’e, F., Marcorelles, P., and Uguen, A. Testing for BRAF fusions in patients with advanced BRAF/NRAS/KIT wild-type melanomas permits to identify patients who could benefit of anti-MEK targeted therapy. 24079. 2019 J Clin Pathol.

Concepts Keywords
BRAF Antineoplastic drugs
FISH Health
Fluorescent Targeted therapy
Hybridisation RTT
Immunotherapy Cancer
KIT Melanoma
Lymph Node Clinical medicine
MEK Medicine
Melanomas Advanced melanomas
Metastasis Immunotherapy
Nuclei Tumour
Targeted Therapy Cutaneous metastasis
Tumour
Wild Type

Semantics

Type Source Name
disease DOID melanoma
pathway BSID Melanoma
disease MESH metastasis
gene UNIPROT SH3PXD2A
disease MESH diagnosis
disease MESH melanomas
gene UNIPROT KIT
gene UNIPROT NRAS
gene UNIPROT BRAF

Original Article

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