Early Diagnosis and Staging.

This report reviews developments in the early diagnosis and staging of prostate cancer and updated on the incidence of postate cancer to discuss the pros and cons of population based screening. Refinements and reliability of various diagnosic procedures are described such as PSA testing, transrectal ultrasound, ratio beteen PSA-level and ultrasound measured prostate volume, rate of change of PSA-level, combination factor equations computed by neural network programs to predict likelihood of prostate cancer, artificial neural network analysis of subvisual transrectal ultrasound information, measurements of different PSA-forms of PSA (in particular percent free PSA), and glandular kallikrein 2.