Abstract
BackgroundMutations of the proto-oncogene BRAF have been described in many cancers. Mutated BRAF causes overactive downstream signaling via MEK and ERK leading to excessive cell proliferation and survival. Their identification is of real interest because specific inhibitors have been developed.Methods and resultsWe report the case of a patient with an aggressive cystadenocarcinoma of the parotid with synchronous metastases. Cisplatine/5FU chemotherapy associated with palliative radiation therapy was used first without any efficency nor clinical improvement. A molecular analysis revealed a BRAF mutation. A compassionate treatment with a BRAF inhibitor showed very good results from the first month. The patient reported real improvement in clinical condition and pain. From an imaging point of view, computed tomographies reported a complete response on mediastinal lymph nodes and regeneration on bone metastases.ConclusionThis first report suggests BRAF could be a potent oncogenic driver in salivary gland carcinoma. It deserves a multicenter academic prospective trial to provide proof of efficiency with BRAF inhibitors in theses tumors.
Highlights
Malignant tumours of the parotid gland are unusual
Since the discovery of the role of RAS oncogenes in tumorigenesis, there has been an explosion of research in the signal transduction area
We report here the case of a patient with an agressive cystadenocarcinoma of the parotid with a B-type RAF proto-oncogene (BRAF) mutation treated with a BRAF inhibitor
Summary
We report the case of a patient with an aggressive cystadenocarcinoma of the parotid with synchronous metastases. Cisplatine/5FU chemotherapy associated with palliative radiation therapy was used first without any efficency nor clinical improvement. A molecular analysis revealed a BRAF mutation. A compassionate treatment with a BRAF inhibitor showed very good results from the first month. The patient reported real improvement in clinical condition and pain. From an imaging point of view, computed tomographies reported a complete response on mediastinal lymph nodes and regeneration on bone metastases
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