ESPE Yearbook of Paediatric Endocrinology

To read the full abstract: J Endocrinol. 2020:JOE-20-0066.R2. PMID: 32380472.Human physiology and behavior are adapted to daily environmental cycles by means of endogenous circadian clocks. Biological tasks, including cell proliferation, differentiation, energy storage and immune regulation, are preferentially confined to specific periods of the 24-h cycle. This circadian rhythm derives fro...

Brief Summary: This longitudinal study provides an in-depth analysis of the clinical, endocrine, and testicular ultrasound (US) patterns in Klinefelter Syndrome (KS) from infancy through puberty and into adulthood, highlighting the progression of testicular degeneration in these patients.In this study, 155 KS patients with the classical 47,XXY karyotype, aged 7 months to 55 years, were prospectively evaluated at a single referral center following a stand...