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Coma and respiratory failure in a child with severe vitamin B(12) deficiency.

Codazzi D, Sala F, Parini R, Langer M

Terapia Intensiva Pediatrica, Ospedali Riuniti, Bergamo, Italy.

OBJECTIVE: Psychofunctional follow-up of severe vitamin B(12) deficit. DESIGN: Case report. SETTING: Pediatric intensive care unit. Patient: Ten-month-old boy. INTERVENTION: Follow-up at 3 yrs. MEASUREMENTS AND MAIN RESULTS: A 10-month-old boy was admitted to the pediatric intensive care unit with respiratory failure, muscular hypotonia, and involuntary movements. Although a central nervous system infection was excluded, computed tomography scan showed a diffuse cortical-subcortical atrophy. Vitamin B(12) deficiency was suspected because of a red-cell count of 1,350,000/mm(3) and a hemoglobin value 5.9 g/dL (MCV 116). The baby had been exclusively breast-fed, but his mother had been a strict vegan for 10 yrs. Chronic dietary vitamin B(12) deprivation was confirmed by blood and urinary samples. Treatment with vitamin B(12) led in 2 wks to rapid and complete hematological improvement and to partial regression of neurologic symptoms. During the following 3 yrs the boy had normal vitamin intake and underwent intensive rehabilitative treatment. The brain atrophy regressed, but linguistic and psychomotor delay persisted. CONCLUSIONS: Rapid clinical improvement after vitamin supply does not correlate with a complete recovery.

Published 28 June 2005 in Pediatr Crit Care Med, 6(4): 483-5.
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