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Published on: January 29, 2018
Acute life-threatening presentation of vitamin D deficiency rickets
H Chehade1, E Girardin, L Rosato
1Lausanne University Hospital, Lausanne, Switzerland. hassib.chehade@chuv.ch
Insights
Severe vitamin D deficiency rickets can lead to life-threatening cardiorespiratory arrest in infants. Early vitamin D supplementation is crucial, particularly for breastfed infants and those in at-risk ethnic groups.
Area of Science:
- Pediatrics
- Endocrinology
- Nutritional Science
Background:
- Clinical manifestations of vitamin D deficiency rickets are well-documented.
- Cardiorespiratory arrest is an exceptionally rare presentation of this condition.
Observation:
- A 16-month-old exclusively breastfed infant, without vitamin D supplementation and with a diet low in dairy, presented with stridor evolving to cardiorespiratory arrest.
- Physical examination revealed clinical signs of rickets, and laboratory tests indicated severe hypocalcemia and decreased 25(OH) cholecalciferol levels.
Findings:
- Radiography confirmed rickets with characteristic bone changes, and dual x-ray absorptiometry showed low bone mineral density.
- The infant's cardiorespiratory arrest was attributed to severe nutritional rickets and associated hypocalcemia.
Implications:
- This case underscores that vitamin D deficiency rickets can be life-threatening.
- Emphasizes the critical importance of vitamin D prophylaxis in infants, particularly those who are exclusively breastfed or belong to at-risk ethnic groups.
Context:
Clinical manifestations of vitamin D deficiency rickets are widely described; however cardiorespiratory arrest is an extremely rare presentation.
Objective:
The aim of this paper is to present the symptoms of severe vitamin D deficiency rickets and to highlight the importance of vitamin D prophylaxis in infants.
Results:
We report a case of a 16-month-old infant who presented to emergency room with a stridor that evolved into a full cardiorespiratory arrest secondary to hypocalcemia. Medical history revealed that the infant was exclusively breastfed without vitamin D supplementation until the age of 10 months. Due to cultural habits, his diet was also grossly deficient in dairy products. Physical exam revealed clinical signs of rickets. Laboratory test showed severe hypocalcemia, elevated alkaline phosphatase, normal serum phosphorous, decreased 25(OH) cholecalciferol, increased intact parathyroid hormone level, and normal urine calcium excretion. The radiography of the wrist showed evidence of cupping, fraying, metaphyseal widening, and demineralization of the distal radial and ulnar metaphyses. The bone mineral density of the lumbar spine measured by dual x-ray absorptiometry showed a Z-score below -2 SD. His cardiorespiratory arrest secondary to hypocalcemia was therefore attributed to severe nutritional rickets.
Conclusion:
Vitamin D deficiency rickets can be life threatening. Vitamin D supplementation is therefore crucial, especially in breastfed infants and some ethnic minorities (dark-skinned people, poor sun exposure), more at risk for developing severe rickets if not supplemented.
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