Hypoparathyroidism can also be associated with more complex syndromes including: 22q Deletion Syndrome; CHARGE association (CHD7); Autoimmune polyglandular syndrome type 1 (AIRE); Hypoparathyroidism, sensorineural deafness, and renal dysplasia (HDR) syndrome (GATA3); mitochondrial disorders; Sanjad-Sakati and Kenney-Caffey syndromes (TBCE or FAM111A) (34). This evidence concerns the gene CHD7 and hypoparathyroidism.