A clinical study of adult patients with chronic bloody diarrhea is performed. One group of these patients is found to have a statistically increased likelihood for the following: antibodies to Saccharomyces cerevisiae but not anti-neutrophil cytoplasmic autoantibodies, NOD2 gene polymorphisms, TH1 and TH17 immune cell activation, vitamin K deficiency, megaloblastic anemia, and gallstones. Which of the following diseases is this group of patients most likely to have?