A 29-year-old woman has recently developed milk intolerance.: (A) celiac disease, (B) gastrinoma, (C) hyperthyroidism, (D) associated with skin pigmentation
Answer is A. Acquired lactase deficiency is very common in GI diseases with evidence of mucosal damage. Examples include celiac and tropical sprue, viral and bacterial infections, giardiasis, cystic fibrosis, and ulcerative colitis. It is not caused by a hyper-sensitivity reaction.