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PSA testing is an important tool to spot prostate cancer, but it remains a bit confusing. Stanford urologist James Brooks clarifies some misconceptions.

PSA testing is an important tool to spot prostate cancer, but it remains a bit confusing. Stanford urologist James Brooks clarifies some misconceptions.

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Radiologist Ali Tahvildari grapples with how to deliver an uncertain diagnosis. When does causing worry conflict with a doctor's pledge to "do no harm?"

Radiologist Ali Tahvildari grapples with how to deliver an uncertain diagnosis. When does causing worry conflict with a doctor's pledge to "do no harm?"

Inspired by his son's illness, Ron Davis and colleagues have discovered a diagnostic test for chronic fatigue syndrome, a notoriously elusive disease.

Inspired by his son's illness, Ron Davis and colleagues have discovered a diagnostic test for chronic fatigue syndrome, a notoriously elusive disease.

By scouting for a particular immune cell in the blood, scientists can tell which patients with a lung-scarring disease are at higher risk for death.

By scouting for a particular immune cell in the blood, scientists can tell which patients with a lung-scarring disease are at higher risk for death.

Doctors are trying to solve the mysteries surrounding the health of famous artists such as Leonardo da Vinci by examining their art.

Doctors are trying to solve the mysteries surrounding the health of famous artists such as Leonardo da Vinci by examining their art.

Type 1 diabetes starts out as a sneak attack by bad-actor antibodies. But scientists at Stanford and UCSF have developed an early-warning system.

Type 1 diabetes starts out as a sneak attack by bad-actor antibodies. But scientists at Stanford and UCSF have developed an early-warning system.

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A new blood test measures the DNA fragments of lung transplant donors in the blood of recipients, in hopes of preventing organ rejection and saving lives.

A new blood test measures the DNA fragments of lung transplant donors in the blood of recipients, in hopes of preventing organ rejection and saving lives.