Severe B12 vitamin deficiency due to diminished dietary intake is a known cause of severe pancytopenia with bleeding diathesis. The authors report a case with sudden-onset bilateral vision loss, severe pancytopenia and multiple organ failure secondary to B12 vitamin deficiency in a patient with a strict vegetarian diet. On funduscopic examination the patient had multiple bilateral exuberant haemorrhages in all retinal layers. Five months after presentation, he had a complete visual recovery without ophthalmological intervention.
- Haematology (incl blood transfusion)
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Contributors CA: conception and design of the work, data collection, data analysis and interpretation, drafting of the article, critical revision of the article.
JFC: data collection, critical revision of the article.
PF: data analysis and interpretation, critical revision of the article.
All authors review and approved the final version of the manuscript to be published.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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