Doctors need to be aware that prostate cancer raises a man’s risk of serious and potentially deadly blood clots by about 50%, researchers say.
All cancer patients are at increased risk for venous thromboembolism (VTE), a dangerous but treatable blood clot in the veins that is a leading cause of death in cancer patients. Previous studies have shown that the odds of developing VTE in Black patients with lung cancer was 2.77-times greater than those in white patients.
Prostate cancer is the most commonly diagnosed cancer in middle-aged and older men. Previous research has suggested that men with prostate cancer are two to three times more likely to develop VTE than those without cancer, the researchers noted in their study, published May 24 in the online journal BMJ Open.
When are men most at risk for blood clots?
In light of significant improvements in prostate cancer care over the last decade, researchers wanted to reassess the risk of VTE in prostate cancer patients.
The greatest risk of VTE is in the first six months after prostate cancer diagnosis, they discovered.
“Physicians treating men with prostate cancer should be aware of the marked increase in VTE risk in these men, particularly in the first six months following cancer diagnosis, to help ensure timely VTE diagnosis,” Yanina Lenz, of Bayer AG in Berlin, Germany, and colleagues wrote.
The investigators analyzed 2007-2017 data from Sweden to assess VTE rates among more than 92,000 men with prostate cancer and a comparison group of more than 466,000 men without the disease.
They found that 3.2% of the prostate cancer patients developed VTE within about five years after their cancer diagnosis, compared with 2.1% of men in the comparison group.
That means that about seven in every 1,000 men with prostate cancer would develop a VTE each year, compared with around four of every 1,000 men without prostate cancer.
After accounting for other factors that could affect VTE risk — such as heart disease and income — the researchers concluded that prostate cancer patients had a 50% higher risk of VTE in the five years after their cancer diagnosis than those of the same age without prostate cancer.
“The magnitude of increased VTE risk among men with prostate cancer seen in our study is lower than that seen for other cancer types as seen in previous studies, and is likely attributable to the high proportion of men with localized disease and at low risk of cancer progression,” Lenz and colleagues said in a journal news release.
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How to prevent blood clots
It is important to talk to your doctor about your risk and whether you need to take medications or other therapies to prevent blood clots. Some doctors may recommend that cancer patients receive preventive medication for blood clots any time they are hospitalized or before, during, and days after they have surgery. Regularly checking your risk of developing blood clots is also important.
If you are prescribed medicine to prevent or treat a blood clot, it will be important to prevent yourself from getting injured because even the smallest injury can cause you to bleed more than normal. Here are some things you can do to prevent small injuries, according to the American Cancer Society:
- Use an electric razor to shave, rather than a straight razor
- Use a soft toothbrush and brush gently to avoid making your gums bleed
- Do not use dental floss unless approved by your doctor
- Avoid blowing your nose forcefully, to avoid a nosebleed
- Avoid falls that could cause bruises; pick up loose throw rugs to avoid tripping
- Eat a healthy diet that includes fiber to avoid constipation. If you get constipated, talk to your cancer care team about using a stool softener. Do not use enemas or suppositories of any kind.
- Keep your head level with or above your heart (lie flat or stay upright)
Blood clots can be dangerous and life-threatening, therefore you should notify your doctor if you experience the following symptoms:
- Sudden chest pain
- Sudden leg or arm pain
- Swelling in the leg or arm
- Fast heart rate
- Shortness of breath
- A feeling of overwhelming dread or doom
- Sweating or fever
- Coughing up blood
Treatments for blood clots will be more effective if they are administered as soon as possible.