Web: | mayocliniclabs.com |
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Email: | mcl@mayo.edu |
Telephone: | 800-533-1710 |
International: | +1 855-379-3115 |
Values are valid only on day of printing. |
Diagnosis of pernicious anemia
Diagnosis of vitamin B12 deficiency-associated neuropathy
Test ID | Reporting Name | Available Separately | Always Performed |
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IFBPA | Intrinsic Factor Blocking Ab, S | Yes, (order IFBA) | No |
MMAPA | Methylmalonic Acid, QN, S | Yes, (order MMAS) | No |
GASTR | Gastrin, S | Yes, (order GAST) | No |
If the vitamin B12 concentration is less than 150 ng/L, then the intrinsic factor blocking antibody (IFBA) test is performed. If IFBA result is negative or indeterminate, then the gastrin test is performed.
If the vitamin B12 concentration is 150 to 400 ng/L, then the methylmalonic acid (MMA) test is performed. If the MMA result is greater than 0.40 nmol/mL, then the IFBA test is performed.
See Vitamin B12 Deficiency Evaluation in Special Instructions.
Immunoenzymatic Assay