Tetralogy of Fallot is the most common cyanotic congenital heart disease worldwide [1]. Among other conotruncal abnormalities, 13-16% of Tetralogy of Fallot individuals are reported to have 22q11.2 deletion syndrome which is characterized by thymic hypoplasia, endocrine abnormalities and hypocalcaemia [2]. Individuals with micro deletion 22q11.2 deletion syndrome are prone to auto immune disord...