Answer:
Some cancers are diagnosed only after symptoms develop. And this may be after the disease has spread or a tumor has grown large enough to be felt or seen in imaging tests.
But many types of cancers can be diagnosed early, before symptoms form. You have the best chance at survival and a healthy quality of life if your cancer is diagnosed and treated in its early stages.
Other cancers can form and grow undetected for 10 years or more
Explanation:
