Male hormone replacement therapy including "andropause".

Adult onset male hypogonadism and the testosterone deficiency of the aging male often are under-recognized entities. The etiologies, presentation, and diagnosis of hypogonadism and andropause in the adult male are presented. The expected therapeutic goals, potential treatment risks, and management of androgen replacement therapy for the adult man are reviewed. The advantages and disadvantages of the various androgen delivery systems currently available and under investigation are discussed.