Classic Hairy Cell Leukemia, also known as leukemic reticuloendotheliosis, is related to intrapelvic lymph node leukemic reticuloendotheliosis and reticuloendotheliosis. An important gene associated with Classic Hairy Cell Leukemia is BRAF (B-Raf Proto-Oncogene, Serine/Threonine Kinase). The drugs Cladribine and Protective Agents have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and b cells.