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Signs and symptoms of intestinal malabsorption

Signs and symptoms of intestinal malabsorption
Malabsorption of Clinical features Laboratory findings
Calories Weight loss with normal appetite  
Fat Pale and voluminous stool, diarrhea without flatulence, steatorrhea Fractional fat excretion (% of dietary fat not absorbed) >7%
Protein Edema, muscle atrophy, amenorrhea Hypoalbuminemia, hypoproteinemia
Carbohydrates Watery diarrhea, flatulence, acidic stool pH, milk intolerance, stool osmotic gap Increased breath hydrogen
Vitamin B12 Anemia, subacute combined degeneration of the spinal cord (early symptoms are paresthesias and ataxia associated with loss of vibration and position sense) Macrocytic anemia, vitamin B12 decreased, serum methylmalonic acid and homocysteine increased
Folate (Vitamin B9) Anemia Macrocytic anemia, serum and RBC folate decreased, serum homocysteine increased
Vitamin B, general Cheilosis, painless glossitis, acrodermatitis, angular stomatitis  
Iron Microcytic anemia, glossitis, pagophagia Serum iron, ferritin and iron saturation decreased
Calcium and vitamin D Paresthesia, tetany, pathologic fractures due to osteomalacia, positive Chvostek and Trousseau signs Hypocalcemia, serum alkaline phosphatase increased, abnormal bone densitometry
Vitamin A Follicular hyperkeratosis, night blindness Serum retinol decreased
Vitamin K Hematoma, bleeding disorders Serum vitamin K, vitamin K-dependent coagulation factors decreased
RBC: red blood cell.
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