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Blood Thinners OK for Cancers That Spread to Brain, Study Finds

Robert Preidt
brain-scan

Treatment didn’t cause significant increase in bleeding in head. Blood-thinning drugs are safe for treating blood clots in patients with cancer that has spread to the brain from other areas of the body, according to new research.

Cancer normally increases a person’s risk of blood clots, the study authors explained in a news release from the American Society of Hematology. When a cancer patient develops a clot, a blood thinner — also called an anticoagulant — is often added to the cancer treatment regimen to prevent the risk of blood clots traveling to the lungs. Such a clot can be fatal.

However, if cancer spreads from other parts of the body to the brain (called brain metastases), doctors are hesitant to prescribe blood thinners because of concern they might cause bleeding in the head, which is already a risk for these patients, the study authors added.

The new findings show that the use of blood thinners in these patients is safe, the researchers said.

“While it is a very common clinical scenario to treat a patient with a metastatic brain tumor who also develops a blood clot, before this study there was very little data to inform the difficult decision of whether or not to anticoagulate these patients,” senior author Dr. Jeffrey Zwicker, of Beth Israel Deaconess Medical Center and Harvard Medical School in Boston, said in the news release.

“Our findings, which demonstrate that current practice is safe, should reassure physicians that anticoagulants can be safely administered to patients with brain metastases and a history of blood clots,” he added.

The study included almost 300 patients with brain metastases and blood clots. The patients were randomly selected to take a blood thinner called enoxaparin (Lovenox) or to take no blood thinners. Just over 100 people took the blood thinner, according to the researchers.

After 12 months, the incidence of bleeding in the head was 44 percent for people taking the blood thinner. In those who didn’t take the drug, 37 percent experienced bleeding in the head. This was not a statistically significant difference, the researchers said.

The investigators found a high bleeding rate among all of the study patients — between 20 percent and 50 percent. The researchers said this shows that bleeding in this group of patients is more common than previously thought.

Last Updated: Jun 2, 2015. By Robert Preidt
Copyright © 2015 HealthDay. All rights reserved

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