Cancer

Q&A: PET scans important in assessing some forms of lymphoma

Dear Mayo Clinic: My father just started chemotherapy for lymphoma, and he is scheduled for a positron emission tomography or PET scan after his first three treatments. How do doctors decide when to perform a PET scan, and ...

Neuroscience

Brain scans may reveal concussion damage in living athletes

Researchers may be closing in on a way to check athletes while they're alive for signs of a degenerative brain disease that's been linked to frequent head blows. Experimental scans found higher levels of an abnormal protein ...

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