V600e mutation of braf gene, the significance of such examination results is to reflect the treatment, diagnosis and prognosis of tumor. The gene is mainly located on chromosome 7 of human body, which is common in thyroid cancer, colorectal cancer and non-small cell lung cancer. If this result is detected without treatment, it is considered that there is a tumor with a wide range of lesions, and it is usually necessary to consider arranging surgical treatment. If it is after treatment, this result at the time of reexamination indicates that there is tumor metastasis. It is necessary to closely observe and judge whether there is metastasis before further treatment.