Conclusion:
Even though AIHA is associated with DiGeorge syndrome, our patient did not develop any AIHA episodes since birth. The authors believe that the combination of viral respiratory infection and vitamin B12 deficiency were the triggers associated with the onset of hemolysis. Combining these triggers is possibly the underlying reason for the late-onset AIHA in our patient with a history of DiGeorge syndrome. Authors suggest checking serum B12 levels regularly in patients with DiGeorge syndrome and a diet deficient in vitamin B12, which may prevent severe hemolytic episodes in this cohort of patients.