[Endocrinology: what's new in 2023].

This overview provides a selection of studies published in 2023 with an impact on clinical practice. In reproductive endocrinology, important studies have addressed fertility preservation in men with Klinefelter's syndrome, the cardiovascular safety of testosterone replacement therapy, and a novel therapy, fezolinetant, for vasomotor symptoms of menopause. The updated European recommendations concerning adrenal incidentalomas will considerably modify current clinical practice. Based on a solid epidemiological work, the prevalence of pituitary adenomas has been confirmed to affect about 1 per 1000 individuals. Finally, a large British study allows to refine the benefit-risk profile of the three options available for the treatment of hyperthyroidism.