Diagnostic substance and method for diagnosing prostate disease

The invention relates to a diagnostic substance for use in a method for diagnosis of prostate diseases, comprising a coupling molecule and a detectable connected thereto, with the aid of a detection device marker, wherein the coupling molecule specifically binds to a as a result of a particular disorder formed in the prostate tissue molecular structure. The invention also relates to a diagnostic method in which the prostate via the bloodstream a diagnostic substance is supplied, which contains a coupling molecule and associated with this marker, the marker for detecting a detection device in or on the body is positioned.