WebMD has a nice concise description of the benefits of early detection. The same criteria applies to both people and animals:
Early disease detection is the use of:
- Screening tests to find health problems before symptoms appear.
- Diagnostic tests, medical exams, and self-exams to find a disease or other health problem early in its course.
Why should you think about early disease detection?
Often, the earlier a disease is diagnosed, the more likely it is that it can be cured or successfully managed. Managing a disease, especially early in its course, may lower its impact on your life or prevent or delay serious complications.