as "benign melanocytic tumor" unequivocally label the benign types, and modern histopathologic tumor classifications used in medicine do not use the word for benign tumors. Research Pharmacotherapy research for un-resectable or metastatic malignant melanoma is ongoing. Targeted therapies In clinical research, adoptive cell therapy and gene therapy, are being tested. Two kinds of experimental treatments developed at the National Cancer Institute (NCI), have been used in metastatic melanoma with tentative success. The first treatment involves adoptive cell therapy (ACT) using TILs immune cells (tumor-infiltrating lymphocytes) isolated from a person's own melanoma tumor. These cells are grown in large numbers in a laboratory and returned to the patient after a treatment that temporarily reduces normal T cells in the patient's body. TIL therapy following lymphodepletion can result in durable complete response in a variety of setups. The second treatment, adoptive transfer of genetically altered autologous lymphocytes, depends on delivering genes that encode so called T cell receptors (TCRs), into patient's lymphocytes. After that manipulation lymphocytes recognize and bind to certain molecules found on the surface of melanoma cells and kill them. A cancer vaccine showed modest benefit in late-stage testing in 2009 against melanoma. BRAF inhibitors About 60% of melanomas contain a mutation in the B-Raf gene. Early clinical trials suggested that B-Raf inhibitors including Plexxicon's vemurafenib could lead to substantial tumor regression in a majority of patients if their tumor contain the B-Raf mutation. In June 2011, a large clinical trial confirmed the positive findings from those earlier trials. In August 2011, Vemurafenib received FDA approval for the treatment of late-stage melanoma. In May 2013 the US FDA approved dabrafenib as a single agent treatment for patients with BRAF V600E mutation-positive advanced melanoma. Some researchers believe that combination therapies that simultaneously block multiple pathways may improve efficacy by making it more difficult for the tumor cells to mutate before being destroyed. In October 2012 a study reported that combining Dabrafenib with a MEK inhibitor trametinib led to even better outcomes. Compared to Dabrafenib alone, progression-free survival was increased to 41% from 9%, and the median progression-free survival increased to 9.4 months versus 5.8 months. Some side effects were, however, increased in the combined study. In January 2014, the FDA approved the combination of dabrafenib and trametinib for the treatment of people with BRAF V600E/K-mutant metastatic melanoma. In June 2018, the FDA approved the combination of a BRAF inhibitor encorafenib and