Case Report
Reversible Vitamin B12 Deficiency Presenting with Acute Dementia, Paraparesis, and Normal Hemoglobin
Table 1
Lab investigations at time of presentation.
| | Lab investigation | Result | Normal values |
| | WBC | /μL | (4.3–10.3)103/μL |
| | Hemoglobin | 12.4 g/dL | (13–18) g/dL | | MCV | 102 fL | (80–96) fL | | Mean corpuscular hemoglobin | 34 pg | (27–34) pg |
| | Platelet | /μL | (150–400)103/μL |
| | Sodium | 144 mmol/L | (136–145) mmol/L |
| | Potassium | 5.1 mmol/L | (3.5–5.1) mmol/L |
| | Creatinine | 0.89 mg/dL | (0.73–1.18) mg/dL |
| | Total creatinine kinase | 1,588 U/L | (30–200) U/L |
| | AST | 36 U/L | (5–34) U/L |
| | ALT | 44 U/L | (0–55) U/L |
| | Total bilirubin | 1.6 mg/dL | (0.2–1.2) mg/dL | | Direct bilirubin | 0.482 mg/dL | (0–0.5) mg/dL |
| | LDH | 264 U/L | (125–220) U/L |
| | Vitamin B12 | <83 pg/mL | (187–883) pg/mL |
| | Serum iron | 6.9 μmol/L | (11.6–31.3) μmol/L |
| | Reticulocyte count | 0.2% | (0.5%–3.5%) |
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