Cobalamin deficiency: clinical picture and radiological findings.
Level 5 - mechanism / opinion, no new human data
Narrative review without systematic methodology or original data
PubMed 24248213 · doi:10.3390/nu5114521
What was done
This is a narrative review summarizing the hematological, gastrointestinal, psychiatric, and neurological manifestations of vitamin B12 (cobalamin) deficiency, along with associated magnetic resonance imaging (MRI) findings.
What was found
The abstract reports no numerical data, sample sizes, or effect estimates. It qualitatively describes hematological signs (elevated mean corpuscular volume, neutrophil hypersegmentation, severe anemia), neuropsychiatric presentations (subacute combined degeneration, peripheral neuropathy, cognitive decline, optic neuropathy), and typical spinal MRI findings showing symmetrical increased T2 signal intensity in the posterior or posterior-lateral cervical and thoracic columns.
Why it matters
It emphasizes that neurological damage—including characteristic spinal cord lesions identifiable on MRI—can precede overt hematologic signs in cobalamin deficiency, underscoring the need for prompt diagnosis and replacement therapy.
Limits
As a narrative review, the abstract contains no original data, quantitative findings, diagnostic accuracy metrics (e.g., MRI sensitivity/specificity), or systematic search methodology.
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