Case Author(s): Ed Grishaw, M.D. and Barry A. Siegel, M.D. , 08/23/96 . Rating: #D3, #Q4

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Brief history:

86-year-old man with dementia, lower extremity edema, and weight loss


The 48-hour urinary excretion of Co-58 cyanocobalamin without intrinsic factor is 0% of the administered dose. The 48 hour excretion of the Co-57 cyanocobalamin-intrinsic factor complex is 0.75% of the administered dose.

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