Leukemia Current Topics in Leukemia

New Drug for Rare, Hard-to-Treat Cancers


Author:

Eric Sabo

Medically Reviewed On: November 30, 2005

A new type of chemotherapy is available for rare forms of lymphoma and leukemia that grow resistant to other treatments.

The drug, called Arranon, was recently approved by the Food and Drug Administration to treat adults and children who have either lymphoblastic leukemia or lymphoma that is caused by cancerous T-cells, an immune system defender that gets overrun by the disease.

Dr. Stacy Berg of the Texas Children's Cancer Center at Baylor College said that Arranon is an important addition for the 1,600 patients who develop these cancers each year. About 500 of them are likely to develop resistance to current treatments, including 200 children.

"This offers a new option for those who have failed to respond or relapsed after treatment," said Berg, who helped conduct early studies on the drug.

Although Arranon is similar to other types of chemotherapy, Berg said that cancerous T-cells seem more sensitive to this newer treatment. Still, she is quick to add that Arranon should not be mistaken as a cure.

"Most likely patients will gain some time," she said.

How long this time is remains unclear. Arranon was approved under the FDA's expedited approval process, which allows potentially lifesaving drugs to speed through the testing process when there are few options available. Several studies are ongoing. "We still have a lot to learn," Berg said.

Arranon is associated with the same types of side effects as other chemotherapies, such as nausea, hair loss and fatigue. The drug was specifically approved to treat those who have T-cell leukemia and lymphomas that have failed to respond to other treatments or relapsed after trying the standard drugs.

In the studies done so far, Arranon caused cancer cells to disappear in some patients, although most saw their cancer return. Berg urges patients to use the drug only after the more proven options have failed first. But in treating children with cancer, Berg is heartened to have some hope.

"This will buy some time until we can find something better," she said.