A 41-year-old patient presented with chronic diarrhea from last 3 months. A D xylose absorption test will reveal which of the following:
Ans. A Carbohydrate malabsorption due to mucosal disorderRef: Methods in Disease: Investigating the Gastrointestinal Tract by Victor R Preddy pg. 43* Xylose is a pentose sugar and is absorbed directly from intestinal nucosa.* D xylose will reveal carbohydrate malabsorption due to mucosal disorder, but in malabsorption due to pancreatic disease, the D-xylose test should be normal.* Due to high false positives and ease of obtaining small intestinal biopsy after endoscopy, intestinal biopsy is the preferred method.
Carbohydrate malabsorption due to mucosal disorder
Carbohydrate malabsorption due to chronic pancreatitis
Fat malabsorption due to mucosal disorder
Fat malabsorption due to chronic pancreatitis
G.I.T.