Numerous clinical studies have shown that African American men with prostate cancer often have more aggressive types of cancer than men of other races. Now, based on the results of a new clinical study, researchers suggest that observation with active surveillance may not be the best option for African American men diagnosed with low-risk prostate cancer. The study involved 256 black men, 1473 white men, and 72 men of other races who had their prostate glands surgically removed after being diagnosed with very low-risk prostate cancer. By analyzing the prostate tissue, researchers determined that 27 percent of black men actually had worse cancer than they were originally diagnosed with, compared to 14 percent of the white men in the study. The study does not change current treatment guidelines, but points to the need for more African American involvement in medical research.