Lactose intolerance Quiz: Ace Your Exams
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A 27-year-old woman comes to her primary care physician for evaluation of bloating and flatulence. The patient’s symptoms have been ongoing for several months and tend to occur after she consumes ice cream or milk. The patient has not lost weight or noticed blood in her stool since symptom onset. Family history is notable for Crohn disease in the patient’s mother. Temperature is 37.0°C (98.6°F), blood pressure is 112/72 mmHg, pulse is 71/min, and respiratory rate is 14/min. Physical examination is unremarkable. Fecal occult blood test is negative. The patient is scheduled for a hydrogen breath test, which returns positive. Which of the following best describes the underlying cause of this patient’s symptoms?
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