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[Floppy baby with macrocytic anemia and vegan mother]

L J Schlapbach1, B Schütz, J M Nuoffer

  • 1Medizinische Universitäts-Kinderklinik, Inselspital, Bern. luregn.schlapbach@insel.ch

Praxis
|February 26, 2008
PubMed

Insights

Infantile cobalamin deficiency, caused by maternal vegan diet, can lead to severe floppy baby syndrome, megaloblastic anemia, and failure to thrive. Early diagnosis and vitamin B12 supplementation are crucial to prevent irreversible neurological damage.

Area of Science:

  • Pediatrics
  • Neurology
  • Nutrition

Background:

  • Maternal dietary choices significantly impact infant health.
  • Cobalamin (vitamin B12) is essential for neurological development and red blood cell formation.
  • Vegan diets require careful planning to ensure adequate vitamin B12 intake.

Observation:

  • A 7-month-old infant presented with acute anemia, generalized muscular hypotonia, and failure to thrive.
  • Laboratory tests confirmed severe cobalamin deficiency.
  • The infant's mother followed a strict vegan diet during pregnancy and lactation.

Findings:

  • The clinical presentation was consistent with infantile cobalamin deficiency, characterized by floppy baby syndrome, megaloblastic anemia, and failure to thrive.
  • Neurological abnormalities, potentially irreversible, were noted and associated with delayed myelination on MRI.
  • Subclinical maternal deficiency, even with normal serum cobalamin and no anemia, can affect the infant.

Implications:

  • Early screening for cobalamin deficiency in infants of mothers on vegan diets is critical.
  • Measuring urinary methylmalonic acid and plasma homocysteine can aid in diagnosing subclinical deficiency.
  • Prompt cobalamin supplementation is vital to prevent irreversible neurological damage in infants and fetuses.

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