The c-myc gene usually represents the onset and development of various tumor diseases. The c-myc gene is both a transposable gene and a regulator gene, which also promotes cell proliferation and division and participates in apoptosis. c-myc gene normal value is non-expression or low expression. The c-myc gene test belongs to the blood test. If the expression of c-myc gene is enhanced, it will promote the malignant transformation of cells and cause the occurrence of tumor. For example, neuroblastosis, lung cancer, stomach cancer, intestinal cancer, breast tumor, cervical tumor, leukemia, retinoblastoma, osteoma, sarcoma, brain tumor and so on. Clinical diagnosis of a certain disease cannot be made on the basis of an abnormal indicator, and it is necessary to cooperate with the doctor to improve the relevant examinations and make a clear diagnosis.