QUESTION #10

The D-xylose absorption test is used to assess small intestinal mucosal function. A decrease in urinary excretion results from decreased mucosal absorption. Several conditions, however, can cause decreased excretion without mucosal disease (a false-positive result). All of the following will decrease excretion EXCEPT:

1- Bacterial overgrowth
2- Rapid small intestinal transport
3- Hepatic decompensation
4- Ascites
5- Renal disease with decreased filtration
6- Incomplete collection

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