A 19-year-old college student presents with acute-onset bloating, abdominal cramping, and watery diarrhea after consuming milkshakes. Vital signs: BP 118/76, HR 88, RR 16, Temp 98.6°F, SpO2 98%. Symptoms resolve when dairy products are avoided. Laboratory studies show normal inflammatory markers (CRP <0.3 mg/dL, ESR 8 mm/hr) and normal colonoscopy. He reports no blood in stool or weight loss. Which of the following best explains his diarrhea?
- A)Inflammatory diarrhea due to neutrophilic mucosal invasion
- B)Malabsorptive diarrhea due to pancreatic lipase deficiency
- C)Exudative diarrhea due to bile acid malabsorption from terminal ileal disease
- D)Secretory diarrhea due to increased cyclic AMP in enterocytes
- E)Osmotic diarrhea due to an unabsorbed carbohydrate loadGABARITO
Explicação
Lactase deficiency prevents digestion of lactose at the brush border, leaving an osmotically active carbohydrate in the lumen. The resulting osmotic diarrhea improves with fasting or avoidance of dairy and is often accompanied by bloating from bacterial fermen... Ver explicação completa e trilha adaptativa →