The sample—focused analysis included 17 studies from retrospective cohorts to case series of at least four patients per paper according to our methods of research, aiming to describe the clinical presentation, particularly, PHP and non-parathyroid tumours, genetic configuration, and the outcome in HJT amid CDC73 spectrum [30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46]. This evidence concerns the gene CDC73 and tumor of parathyroid gland.