What these buzzy new tests can and can't tell you.

There is both good news and bad news about prostate cancer screening. First, the bad news: the blood test involved, which measures a compound called prostate-specific antigen (PSA), is too inaccurate.

MRIs are an effective diagnostic tool for pituitary tumors. Although MRI scans can miss very small tumors, newer machines are better equipped to detect them. Most pituitary tumors are noncancerous, or ...

MRI is a diagnostic test that doctors use to diagnose and track the progress of amyotrophic lateral sclerosis (ALS). ALS is a progressive disease that damages nerve cells in the brain and spinal cord.

A full-body scan every few years, for some, is a small price to pay for a wide-ranging check-up. Is it the right choice for everyone? That depends.