A diagnosis of prostate cancer raises the question for patients and their physicians as to how the tumor will behave. Will it grow quickly and aggressively and require continuous therapy, or slowly, allowing treatment and its risks to be safely delayed? The answer may lie in the size and shape of the blood vessels that are visible within the cancer, as per research led by researchers at The Ohio State University Comprehensive Cancer Center-Arthur G. James Cancer Hospital and Richard J. Solove Research Institute in collaboration with the Harvard School of Public Health........