Of note, two individuals were reported to have normal MRI brain images in the first year of life (at 6 and 9 months, respectively), suggesting that a normal brain MRI in infancy may be falsely reassuring in individuals with NDUFA13 deficiency (and possibly other causes of complex I deficiency); imaging should be repeated if there is ongoing clinical suspicion. Here, NDUFA13 is linked to hyperinsulinemic hypoglycemia, familial, 4.