Inflammatory bowel diseases (idiopathic ulcerative colitis and Crohn's disease) are complex diseases, and their etiologies have yet to be fully understood. Inflammatory bowel diseases can be present in combination with other syndromes, such as lactase intolerance and irritable bowel syndrome (IBS). In addition, extraintestinal manifestations such as renal lithiasis are not uncommon. Chronic diarrhea or constipation with abdominal pain are indicative of IBS, which is classified as a functional

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... strointestinal disorder. The syndrome is characterized by changes in bowel habits in the absence of a specific organic disease. Various criteria have been proposed for the diagnosis of IBS, and these criteria have un-