Mammogram results from one to six weeks after a Covid-19 vaccination could be inaccurate if doctors misread enlarged lymph nodes as cancer.
Coronavirus vaccines are known to trigger a strong immune response in the body, and this in turn can lead to inflamed lymph nodes in the armpit.
The swollen glands are usually a good sign that the body’s immune system has responded appropriately to the vaccine and created antibodies.
But swollen lymph nodes can also be a symptom of breast cancer, so women who have scheduled a screening immediately after vaccination might find their results worrying.
Dr Taghreed Al Mahmeed, a consultant breast surgeon at Al Zahra Hospital Dubai, said women should not panic if their mammogram results indicated enlarged lymph nodes.
“I have seen many female patients coming in worried with pain and light swelling in the underarm post the Covid-19 vaccination.
"However, after taking a full history and carrying out the appropriate investigations, and proceeding with the follow-up in two to three months, the results were back to normal," she said.
Mammograms should be carefully scheduled
The phenomenon of potentially misleading mammogram results after Covid-19 vaccination was published in recent international publications, including the American Journal of Roentgenology and the Journal of the American College of Radiology.
As a result, the Centres for Disease Control and Prevention in the US issued new guidelines for choosing the right time to schedule screening.
A mammogram is an X-ray picture where two views are taken of each breast.
Although the process is very important and in many cases should not be delayed, if there is no known risk or concern of breast cancer, the US health institute recommends that patients postpone mammograms for six weeks after the second dose of the Covid-19 vaccine.
Alternatively, women can schedule the mammogram just before the date of the first shot.
If lymph nodes do show up as swollen on a mammogram, Dr Al Mahmeed said it was advisable to have an ultrasound two or three months later.
"We fully encourage people to get vaccinated, and in case they experience the [lymph node] symptoms they should not panic but rather visit a doctor to ensure everything is OK,” she said.
Dubai residents receive Covid-19 vaccine – in pictures
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People queue for the vaccine near DIFC. The city has approved Pfizer-BioNTech, Sinopharm and Oxfrd-AstraZeneca for use, and officials hope to have half the population vaccinated by late March. AFP -
Abu Dhabi has vaccinated at least 60 per cent of teachers and school staff, many during a week-long vaccine drive in late January. Courtesy: Adek -
A man receives a dose of a vaccine against Covid-19 at St Paul’s Church in Abu Dhabi. Khushnum Bhandari / The National -
A vaccine is administered at Bareen International Hospital in Mohamed Bin Zayed City, Abu Dhabi. Courtesy: Bareen hospital -
Abu Dhabi has vaccinated at least 60 per cent of teachers and school staff, many during a week-long vaccine drive in late January. Courtesy: Adek -
Airport personnel unload a coronavirus vaccine shipment at Dubai International Airport on February 1, 2021. AFP -
An Emirates Airlines Boeing 777 unloads a coronavirus vaccine shipment at Dubai International Airport on February 1, 2021. The airline is part of the Vaccine Logistics Alliance, which includes also logistics giant DP World. Karim Sahib / AFP -
People wait to enter a vaccination centre at Dubai's financial district on January 24, 2021. AFP -
People queue for the vaccine near DIFC. The city has approved Pfizer-BioNTech, Sinopharm and Oxfrd-AstraZeneca for use, and officials hope to have half the population vaccinated by late March. AFP -
A teacher gives a thumbs up as he receives the Sinopharm vaccine in Abu Dhabi. Courtesy: Department of Education and Knowledge -
A placard informs the public of the location of a designated Covid-19 vaccination centre in Dubai's financial centre district. AFP -
People in Dubai queue for a vaccine on January 24, 2021. AFP
