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Swelling after COVID-19 shots may cause cancer false alarms

By LAURAN NEERGAARD AP Medical Writer
Anyone getting a mammogram or other cancer check soon after a COVID-19 vaccine should alert doctors, to prevent false alarms from a side effect. That’s advice from cancer experts and radiologists. Sometimes lymph nodes, especially in the armpit, swell after the vaccinations. It’s a normal reaction by the immune system but one that might be mistaken for cancer if it shows up on a mammogram or other scan. A panel of cancer experts say you shouldn’t delay getting a coronavirus vaccine — or any urgent cancer check-ups. But tell the radiologist before any scan if you’ve been recently vaccinated.

 

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