Cancer is not a single disease but a group of related diseases.

Q. Is arthritis a single disease or are there different types?

Sometimes multiple tests are used for a single disease to cover the limitations of each test.

Mental illness is not a single disease; the term covers a number of disorders.

Efforts need to be coordinated rather than focusing on single disease.

But the benefits of major depression, taken as a single disease, have been hard to demonstrate.

For these reasons, human cancer is really not a single disease but is a family of different diseases.

It's a collection of risk factors, not a single disease.

C1 Two genes may have roles in a single disease.

Cancer was once thought to be a single disease that attacked different tissues.