Urine methylmalonic acid level

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Gultepe M, Ozcan O, Avsar K, et al: Urine methylmalonic acid measurements for the assessment of cobalamin deficiency related to neuropsychiatric disorders. Clin Biochem 2003; 36:275-282.

Elin RJ & Winter WE: Methylmalonic acid: a test whose time has come. Arch Pathol Lab Med 2001; 125(6):824-827.

Magera MJ, Helgeson JK, Matern D, et al: Methylmalonic acid measured in plasma and urine by stable-isotope dilution and electrospray tandem mass spectrometry. Clin Chem 2000; 46:1804-1810.

Klee GG: Cobalamin and folate evaluation: measurement of methylmalonic acid and homocysteine vs vitamin B(12) and folate. Clin Chem 2000; 46(8 Pt 2):1277-1283.

Snow CF: Laboratory diagnosis of vitamin B12 and folate deficiency: a guide for the primary care physician. Arch Intern Med 1999; 159(12):1289-1298.

Norman EJ & Morrison JA: Screening elderly populations for cobalamin (vitamin B12) deficiency using the urinary methylmalonic acid assay by gas chromatography mass spectrometry. Am J Med 1993; 94(6):589-594.

Matchar DB, Feussner JR, Millington DS, et al: Isotope-dilution assay for urinary methylmalonic acid in the diagnosis of vitamin B12 deficiency. A prospective clinical evaluation. Ann Intern Med 1987; 106(5):707-710.

Tietz NW (Ed): Clinical Guide to Laboratory Tests, 3rd ed. W. B. Saunders, Philadelphia, PA, 1995.