Diseases, Conditions, Syndromes

Q and A: Dupuytren's contracture

DEAR MAYO CLINIC: I have a painless mass in my palm that has been getting larger over the past year or so. It is firm, and when I extend my fingers, I feel it stretch like it is under tension. What is this mass, and how do ...

Oncology & Cancer

21st century medical needles for high-tech cancer diagnostics

The diagnosis of diseases like cancer almost always needs a biopsy—a procedure where a clinician removes a piece of suspect tissue from the body to examine it, typically under a microscope. Many areas of diagnostic medicine, ...

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