Abstract: The present invention concerns means and methods for cancer diagnosis and, in particular, diagnosis of prostate cancer. Specifically, it relates to a method for diagnosing whether a subject is at risk for recunent prostate carcinoma after prostatectomy comprising determining the amount of at least one metabolite selected from Table 2 in a test sample of a subject after prostatectomy, and comparing the determined amount to a reference, whereby it is diagnosed whether the subject is at risk for recurrent prostate carcinoma after prostatectomy. Further methods provided in accordance with the present invention relate to differentiating between a malignant prostate carcinoma tissue and a non-malignant tissue and diagnosing metastasizing prostate carcinoma in a subject. Also provided are devices for carrying out the aforementioned methods.