Medical tests Archive

Most cancer screening guidelines recommend an upper age limit to cease regular testing. But older adults should ask their doctor whether the benefits of continuing screening outweigh the risks, which may include unnecessary treatments and potentially dangerous complications.

Full-body MRI scans are marketed as a way to detect hidden cancers and other health conditions before symptoms appear. But these elective scans aren't as precise as medically recommended MRIs and may reveal harmless abnormalities that lead to unnecessary follow-up tests.

MRI contrast dye is widely used and considered safe. It helps highlight blood vessels, tumors, and other structures to improve diagnostic accuracy. Rarely, contrast dye can trigger a serious condition called nephrogenic systemic fibrosis in people with advanced kidney disease.

Home microbiome tests are pricey and not yet scientifically reliable. Stay on top of your gut health by skipping the test and focusing instead on following a fiber-rich, Mediterranean-style diet that minimizes meat and processed foods.

After removal of precancerous growths (polyps) in the colon, return for a follow-up colon exam in three, five, or 10 years, depending on the number and types of growths that the doctor found and removed. A healthy diet can help prevent cancer.