Insomnia is not a disease, and no test can diagnose it.

The tests can also diagnose the disease by identifying cancer cells that are already present.

Most often, you won't have any special tests to diagnose acne.

Because this disease has different forms, no one test can firmly diagnose it.

Doctors use brain scans and other tests to diagnose epilepsy.

In the stereotype-threat condition, they told students the test diagnosed intellectual ability.

Ministers claim the test will identify early developmental problems and diagnose special needs at a young age.

Before a doctor can begin treating back pain, he or she may do tests to diagnose what is causing the patient's problem.

He was scheduled to undergo tests to further diagnose the tumor and plan treatment.

Doctors use this test to diagnose and keep track of asthma.