HER2, the gene symbol, is derived from a homologous viral oncogene, Erythroblastic Leukemia Viral Oncogene, and has the official name: V-Erb-B2 Avian Erythroblastic Leukemia Viral Oncogene Homolog or HER2 accordingly (16). The gene discussed is ERBB2; the disease is acute erythroid leukemia.