Innervation and Vasculature Neoplasm (IMAGE) Albert Einstein College of Medicine Caption This image shows tissue from an early-stage tumor developing in a mouse model of prostate cancer. Sympathetic-nerve fibers (green) are closely intertwined with blood vessels (white). Norepinephrine released by nerve fibers stimulates vessel proliferation that fuels tumor growth. Image courtesy Albert Einstein College of Medicine Credit Courtesy of Albert Einstein College of Medicne Usage Restrictions none License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.