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Breast MRI helps predict chemotherapy's effectiveness
Date:5/22/2012

OAK BROOK, Ill. Magnetic resonance imaging (MRI) provides an indication of a breast tumor's response to pre-surgical chemotherapy significantly earlier than possible through clinical examination, according to a new study published online in the journal Radiology.

Women with breast cancer often undergo chemotherapy prior to surgery. Research has shown that women who receive this treatment, known as neoadjuvant chemotherapy, are more likely to achieve breast conservation than those receiving chemotherapy after surgery.

Clinicians track a patient's response to neoadjuvant chemotherapy through clinical measurements of the tumor's size and location. Contrast-enhanced MRI offers a promising alternative to the clinical approach through its ability to detect blood vessel formation in tumors, known as angiogenesis. Angiogenesis is an earlier and more accurate marker of tumor response.

"MRI was better than the clinical approach for predicting which patients would go on to have complete tumor response," said Nola M. Hylton, Ph.D., professor of radiology and biomedical imaging at the University of California in San Francisco. "It gave us great information on early response to treatment."

For the study, researchers analyzed data from ACRIN 6657, the imaging component of the multicenter Investigation of Serial Studies to Predict Your Therapeutic Response with Imaging And moLecular Analysis (I-SPY TRIAL) breast cancer trial.

They compared MRI and clinical assessment in 216 female patients ranging in age from 26 to 68 years undergoing neoadjuvant chemotherapy for stage II or III breast cancer. MRI sessions were performed before, during and after administration of a chemotherapy regimen. The researchers correlated imaging results with subsequent laboratory analysis of surgical samples.

MRI size measurements were superior to clinical examination at all time points, with tumor volume change showing the greatest relat
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Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

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