Prostate cancers vary widely in their ability to progress. One of the important factors for growth and progression is the tumor\u2019s ability to stimulate the development of blood vessels to nourish it. If we find ways to inhibit development of new blood vessels, called \u201cangiogenesis\u201d, we can prevent prostate cancer from progressing. Some dietary factors have been linked to increasing and decreasing the growth of new blood vessels. Dr. Giovannucci will examine how dietary factors are associated with the degree of blood vessels in the tumor, measured among men with how have had their prostate removed. This study will inform on novel prostate cancer prevention strategies through diet so that, in future, men could be advised which dietary factors may help prevent prostate cancer from progressing.