Sudden Onset of Brain Metastasis despite the Use of Vemurafe
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Vemurafenib is an inhibitor of the BRAF mutation and has been approved by the Food and Drug Administration as a treatment option for patients with unresectable melanoma without brain metastasis. In the literature, vemurafenib has been reported to be also effective against brain metastasis. We encountered 3 cases with brain metastasis on vemurafenib therapy. In these cases, vemurafenib was clinically effective against metastatic lesions other than those in the brain. The brain lesions developed after the metastatic lesion had occurred. Therefore, we assume that the melanomas of the patients acquired resistance against vemurafenib. The brain metastases were treated with the cyberknife. Patients 1 and 2 without LDH elevation are still alive, but patient 3 with abnormal LDH elevation died despite the treatment....

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