 These patients are frequently misdiagnosed as having the irritable bowel syndrome, as clinicians fail to recognize the condition, do not think of performing a SeHCAT test, or do not have it available.There have been at least 18 studies of the use of SeHCAT testing in diarrhea-predominant irritable bowel syndrome patients.When these data were combined, 32% of 1223 patients had a SeHCAT 7-day retention of less than 10%, and 80% of these reported a response to cholestyramine, a bile acid sequestrant.