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Test Predicts Course of Childhood Brain Tumor

By HospiMedica staff writers
Posted on 06 Aug 2003
Researchers studying the most common type of childhood brain tumor, pilocytic astrocytoma, have found that the amount of Ki-67 antigen expressed on the cancer cells is indicative of the likelihood of the tumor to progress or re-occur after surgery.

Investigators at the University of Texas Southwestern Medical Center (Dallas, USA) used the MIB-1 antibody, which is specific for Ki-67, to evaluate 118 young cancer patients. More...
As reported in their paper in the August 2003 issue of the Journal of Clinical Oncology, they established an MIB-1 index by using immunohistolytical methods to compare the number of MIB-1 positive and negative cells in the tumor.

Senior author Dr. Linda Margraf, associate professor of pathology at the University of Texas Southwestern Medical Center said, "Patients with more than 2% of positive cells had an increased risk of cancer recurrence or growth. The test, although time-consuming, is now available and could benefit children with a history of pilocytic astrocytomas. Most pathology labs can do it, and it is available at most major medical centers,” Dr. Margraf said.




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