Peter S. LaViolette1,
Elizabeth Cochran2, Alexander D. Cohen3, Mona
Al-Gizawiy1, Jennifer Connelley4, Scott D. Rand1,
Mark G. Malkin4, Kathleen M. Schmainda1
1Radiology,
Medical College of Wisconsin, Milwaukee, WI, United States; 2Pathology,
Medical College of Wisconsin, Milwaukee, WI, United States; 3Biophysics,
Medical College of Wisconsin, Milwaukee, WI, United States; 4Neurology,
Medical College of Wisconsin, Milwaukee, WI, United States
Recent conflicting reports show that regions of bevacizumab induced restricted diffusion, as measured with DWI MRI contain neoplastic hypercellularity or atypical necrosis. In this study we look at one sample from a glioblastoma patient ex-vivo. We find that regions of dark ADC contain both hypercellularity and necrosis. Regions of necrosis had more restricted diffusion than regions of hypercallularity. rCBV was also decreased in necrotic regions compared to hypercellularity.