Which condition is associated with recurrent viral infections and a prolonged QT interval?

Digeorge syndrome, also known as 22q11.2 deletion syndrome, is characterized by a range of immunodeficiencies leading to recurrent infections, particularly viral infections. This syndrome results from a developmental defect in the third and fourth pharyngeal pouches, which causes abnormalities in the thymus and parathyroid glands. The impaired development of the thymus leads to T-cell deficiency, making individuals more susceptible to infections caused by viruses.

In addition to the immunodeficiency, Digeorge syndrome is also associated with cardiac defects and findings such as a prolonged QT interval, which can affect the heart's electrical activity. This prolonged QT interval can lead to arrhythmias, further complicating the health of individuals with this condition.

The other conditions listed do not typically present with this specific combination of recurrent viral infections and a prolonged QT interval. For instance, cystic fibrosis is primarily associated with respiratory and digestive issues but does not involve immune deficiency in the same way. Sickle cell anemia leads to various complications primarily due to hemolytic anemia and vaso-occlusive crises, not generally linked to the immune system as described. Hemophilia is a bleeding disorder resulting from clotting factor deficiencies and does not present with the issues related