Clinical evaluation of children referred to paediatric haematology clinics for elevated serum vitamin B12 levels
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By
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Yeşim Yiğit
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May 13, 2026
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Clinical Scorecard: Assessment of Pediatric Patients Referred to Hematology Clinics Due to Increased Serum Vitamin B12 Concentrations
At a Glance
| Category | Detail |
|---|
| Condition | Elevated Serum Vitamin B12 Levels |
| Key Mechanisms | Associated with malignancies, liver and renal diseases, and inflammatory conditions. |
| Target Population | Pediatric patients referred to hematology clinics. |
| Care Setting | Pediatric hematology and oncology clinics. |
Key Highlights
- Elevated vitamin B12 levels often detected incidentally during routine evaluations.
- Most patients did not show symptoms suggestive of malignancy.
- Chronic myeloid leukaemia was diagnosed in two patients with additional abnormalities.
- Many patients had benign or inflammatory conditions or no identifiable pathology.
- Isolated hypercobalaminaemia rarely indicates malignancy.
Guideline-Based Recommendations
Diagnosis
- Evaluate elevated vitamin B12 levels within the clinical context.
Management
- Conduct basic clinical assessments and initial laboratory evaluations.
Monitoring & Follow-up
- Monitor for additional clinical and laboratory abnormalities in patients with elevated levels.
Risks
- Unnecessary referrals and associated anxiety may arise from isolated elevated vitamin B12 levels.
Patient & Prescribing Data
Children referred for elevated serum vitamin B12 levels.
Most children have benign or inflammatory conditions; serious conditions are rare.
Clinical Best Practices
- Increase awareness of referral patterns and expected outcomes.
- Interpret elevated vitamin B12 levels in conjunction with clinical findings.
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