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Updated: Jun 4, 2026

Modifying Levels of Maternal Dietary Folic Acid or Choline to Study the Impact of Deficiencies on Offspring Health Outcomes
Published on: June 28, 2024
Intact recovery from early 'acquired methylmalonic aciduria' secondary to maternal atrophic gastritis
Wencke Weber-Ferro1, Christoph Hertzberg, Helmut Röder
1Department of Pediatrics, Klinikum Neukölln, Berlin, Germany.
Aim:
A 6-month-old infant with severe hyporegenerative anaemia, muscular hypotonia and developmental delay is reported, and the metabolic, diagnostic and therapeutic implications of this case are discussed.
Results:
Diagnostic work-up disclosed vitamin B12 depletion with an elevated excretion of methylmalonic acid (MMA), but a normal plasma total homocysteine. MRI showed fronto-temporal atrophy and a delay in myelinization. The boy's disease was attributable to a maternal atrophic gastritis. After initiation of vitamin B12 supplementation, he quickly recovered regarding haematopoiesis and MMA excretion. His neurological development completely normalized during 18 months of follow-up including assessment by Bayley scores.
Conclusion:
As the majority of reported patients with this acquired form of methylmalonic aciduria show a persistent neurological deficit, early diagnosis of this condition is mandatory and should include sensitive markers of vitamin B12 depletion, namely MMA formation and plasma homocysteine.
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