Overview
Bile acid malabsorption (BAM) is characterized by the excessive loss of bile acids in the feces, leading to chronic symptoms such as diarrhea, often secondary to terminal ileal disease or idiopathic in nature 2.Diagnosis
Key Symptoms: Chronic diarrhea, steatorrhea 2.
Diagnostic Tests: SeHCAT (Selenium Homocholic Acid Taurine) test is considered definitive but underutilized 2.
Types of BAM:
- Type 1: Secondary to terminal ileal disease (61%) 2.
- Type 2: Idiopathic (22%) 2.
- Type 3: Unrelated to terminal ileal disease (15%) 2.
Investigation Rates: Only 6% of gastroenterologists investigate for BAM first-line in chronic diarrhea cases 2.Management
First-Line Treatments:
- Cholestyramine: Commonly used to bind bile acids and reduce symptoms 2.
- Colesevelam: Alternative bile acid binder 2.
Adjunctive Treatments: Dietary modifications, including fat restriction, may help manage symptoms 2.Special Populations
Pediatrics: Not specifically addressed in provided abstracts 12.
Elderly: Not specifically addressed in provided abstracts 12.
Comorbidities: Terminal ileal disease is a significant comorbidity associated with Type 1 BAM 2.Key Recommendations
Consider BAM in patients with chronic diarrhea, especially those with suspected terminal ileal disease 2 (Evidence: Moderate).
Utilize definitive diagnostic tests like SeHCAT for accurate diagnosis despite low current utilization rates 2 (Evidence: Moderate).
Initiate cholestyramine or colesevelam for symptomatic relief in diagnosed cases of BAM 2 (Evidence: Expert opinion).References
1 Alrehaili BD, Lee M, Takahashi S, Novak R, Rimal B, Boehme S et al.. Bile acid conjugation deficiency causes hypercholanemia, hyperphagia, islet dysfunction, and gut dysbiosis in mice. Hepatology communications 2022. link
2 Khalid U, Lalji A, Stafferton R, Andreyev J. Bile acid malabsoption: a forgotten diagnosis?. Clinical medicine (London, England) 2010. link