Your lymph system is a body wide network of nodes and conduits that remove excess interstitial fluid from soft tissue and transports white blood cells to and from you bones. Your lymph system is one of two ways (the other being your blood stream) that cancer can metastasize beyond the primary area of origin.
BRAF is a human gene that makes a protein called B-Raf. Mutations in this gene have been found in cancers, including melanoma. More than 30 mutations of the BRAF gene associated with human cancers have been identified. One or more BRAF mutations are found in over 80% of melanomas. The good news is that that is a drug (Vemurafenib) that is a BRAF inhibitor and can be used as targeted therapy.