The diagnostic rate may have increased because awareness about PHP and NS-HypoPT has increased and molecular genetic diagnostic methods have advanced.15,16 PHP may be suspected in patients who present with AHO and hypothyroidism, and PTH resistance has been found before the onset of hypocalcemia.15 There have also been reports of cases in which DiGeorge syndrome was genetically diagnosed, as distinguished from other symptoms, and hypoparathyroidism was diagnosed as a result of close examination.16 Here, PTH is linked to 22q11.2 deletion syndrome.