Summary of the September 15, 2009 issue of JNCI

Issue 18 of the JNCI includes a study and an editorial on the contribution of clinical breast examination to breast cancer screening and a study and an editorial on using fecal DNA methylation to detect gastric and colorectal cancers. This issue also includes studies on melanosomes and sensitivity of melanoma cells to chemotherapy; the risk of prostate cancer from high serum insulin levels; and a brief communication that profiles prostate cancer diagnosis and racial disparities in the U.S.