Precision medicine, often known as personalized medicine, is becoming an important aspect of current cancer treatment. It involves adapting treatment to mutations detected in the patient's tumor rather than tailoring treatment to a person's individual genome sequence. Precision medicine in cancer entails analyzing DNA from tumors to find mutations or other genetic abnormalities that cause the cancer. Healthcare professionals may therefore be able to choose a treatment for a specific patient's cancer that best fits, or targets, the tumor DNA alterations. Such treatments are becoming more prominent. Precision medicine already has a significant impact on cancer diagnosis and therapy, and it will become even more so in the future.