Genetic causes of hyperparathyroidism with NL and/or NC are Familial primary hyperparathyroidism (CDC73 gene, AD inheritance, OMIM phenotype number 145000) and Hyperparathyroidism 4 (GCM2 gene, AD inheritance OMIM phenotype number 617343) (Lila et al., 2012; El Allali et al., 2021). The gene discussed is GCM2; the disease is Alzheimer disease.