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Prognostic model developed for MDS related to prior cancer therapy
Date:12/13/2011

SAN DIEGO - A large-scale analysis of patients whose myelodysplastic syndrome is related to earlier cancer treatment overturns the notion that all of them have a poor prognosis, researchers from The University of Texas MD Anderson Cancer Center report at the 53rd Annual Meeting of the American Society of Hematology.

"MDS patients whose disease springs from earlier radiation, chemotherapy or both treatments are usually told that they have a poor prognosis. But by analyzing survival risk factors in a large patient population, we've found these patients fall into good, intermediate and poor prognostic groups," said study leader Guillermo Garcia-Manero, M.D., Ph.D., professor in MD Anderson's Department of Leukemia.

Understanding their differing characteristics will better inform treatment decisions for these patients, Garcia-Manero said.

Myelodysplastic syndrome consists of a group of diseases in which the bone marrow progenitor cells that normally morph into red and white blood cells and platelets fail to respond to normal growth controls. That results in too many progenitor cells (also known as blasts) and too few mature blood cells, and in about 30 percent of patients, the disease progresses to acute myeloid leukemia (AML).

Treatment-related MDS is often more resistant to therapy

Therapy-related MDS generally differs from other MDS cases by having more chromosomal abnormalities, a higher rate of conversions to acute myeloid leukemia and high resistance to standard MDS therapy. Even so, Garcia-Manero notes, a one-size-fits-all poor prognosis is not accurate.

The research team analyzed 1,950 MD Anderson patients treated between 1998 and 2007. It found 438 had a history of one or more previous cancers that were treated before their MDS diagnosis. Of these, 279 cases who had received chemotherapy, radiotherapy or both were analyzed.

A first round of analysis identified at least 15 factors a
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Contact: Scott Merville
smerville@mdanderson.org
713-516-4855
University of Texas M. D. Anderson Cancer Center
Source:Eurekalert  

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