Rushville Republican

Health

July 8, 2014

Purdue-designed tool helps guide brain cancer surgery

WEST LAFAYETTE — A tool to help brain surgeons test and more precisely remove cancerous tissue was successfully used during surgery, according to a Purdue University and Brigham and Women’s Hospital study.

The Purdue-designed tool sprays a microscopic stream of charged solvent onto the tissue surface to gather information about its molecular makeup and produces a color-coded image that reveals the location, nature and concentration of tumor cells.

“In a matter of seconds this technique offers molecular information that can detect residual tumor that otherwise may have been left behind in the patient,” said R. Graham Cooks, the Purdue professor who co-led the research team. “The instrumentation is relatively small and inexpensive and could easily be installed in operating rooms to aid neurosurgeons. This study shows the tremendous potential it has to enhance patient care.”

Current surgical methods rely on the surgeon’s trained eye with the help of an operating microscope and imaging from scans performed before surgery, Cooks said.

“Brain tumor tissue looks very similar to healthy brain tissue, and it is very difficult to determine where the tumor ends and the normal tissue begins,” he said. “In the brain, millimeters of tissue can mean the difference between normal and impaired function. Molecular information beyond what a surgeon can see can help them precisely and comprehensively remove the cancer.”

The mass spectrometry-based tool had previously been shown to accurately identify the cancer type, grade and tumor margins of specimens removed during surgery based on an evaluation of the distribution and amounts of fatty substances called lipids within the tissue. This study took the analysis a step further by additionally evaluating a molecule associated with cell growth and differentiation that is considered a biomarker for certain types of brain cancer, he said.

“We were able to identify a single metabolite biomarker that provides information about tumor classification, genotype and the prognosis for the patient,” said Cooks, the Henry Bohn Hass Distinguished Professor of Chemistry. “Through mass spectrometry all of this information can be obtained from a biopsy in a matter of minutes and without significantly interrupting the surgical procedure.”

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