[Severe life-threatening in an infant due to deficiency rickets].

The authors report on a case of cardiocirculatory arrest in a 4-month old infant, related to severe vitamin D deficiency rickets with hypocalcemia. Despite medical follow-up, this infant, who was breast-fed during the first 3 weeks of life, did not receive any vitamin D prophylaxis. This observation shows the potential severity of vitamin D deficiency rickets. Thus, systematic prophylaxis should be applied as soon as the infant is born, even in breast-fed children.