Michael Zitzmann

TL;DR: Patients with Klinefelter's syndrome, including the non-mosaic type, need no longer be considered irrevocably infertile, because intracytoplasmic sperm injection offers an opportunity for procreation even when there are no spermatozoa in the ejaculate.

TL;DR: In aging male patients, psychosomatic complaints and metabolic risk relate to testosterone in a symptom-specific manner, and there is no evidence that a uniform structure of testosterone concentrations and complaints exists within the cohort of elderly male patients.

TL;DR: This review focuses on the multidirectional impact of low testosterone associated with obesity and the metabolic syndrome and its effects on erectile dysfunction and CVD risk in men with type 2 diabetes.

TL;DR: Recommendations on the clinical spectrum of hypogonadism related to metabolic and idiopathic disorders that contribute to the majority of cases that occur in adult men are focused on.

TL;DR: This review summarises the correlations between testosterone levels and male physical appearance and behaviour and suggests that both generalisation and individualisation of study results will lead to doubtful conclusions and prejudices.