Correspondence re: J. B. de Kok et al., DD3, A very sensitive and specific marker to detect prostate tumors. Cancer Res., 62: 2695-2698, 2002.

We read with great interest the article published in Cancer Research by de Kok et al . [(1)][1] , who underlined the role of DD3 gene as a sensitive and specific marker of prostate cancer, thus suggesting its hypothetical role to identify circulating cancer cells in prostate cancer patients. On the