Congenital vitamin D deficiency: a rare etiology of an acute life threatening event in early infancy.

Infants born to mothers with deficiency of vitamin D and/or calcium due to cultural modifications in their diets, life style and clothing habits, are at risk of developing early and fatal sequelae of hypocalcemic vitamin D deficiency. We present a 44-day-old infant with hypocalcemia secondary to congenital vitamin D deficiency, who presented as a recurrent Acute Life Threatening Event (ALTE) resulting in an unexpectedly prolonged intensive care course. This report suggests that evaluation of vitamin D status should be included as part of the workup of ALTE and we describe evidence-based preventive measures for both mothers and infants who are at risk for vitamin D deficiency.