Osteoporosis after extensive small bowel resection

What is known

• In a heterogeneous small-intestinal-resection cohort (mostly Crohn's), 21% had osteoporosis and 52% osteopenia by WHO criteria, with reduced lumbar-spine and hip BMD z-scores. ¹
• Ileal resection was identified as a risk factor for lower bone density; resected patients had higher osteoporosis rates than non-resected Crohn's patients. ²
• Iliac-crest biopsy after small-bowel resection (mean 105 cm resected) showed markedly reduced trabecular bone mass versus controls, largely without vitamin D abnormality or osteomalacia. ³

What is unknown / caveats

• Single small cross-sectional cohort (n=42) drives the 21% figure; mixed underlying diagnoses, not pure Crohn's
• No prevalence estimate specific to 'extensive' resection / short-remnant subgroups
• Resection contribution confounded with steroid use, age, and disease activity
• The retrieved data do not isolate a prevalence figure for extensive resection specifically or separate the resection effect from steroids and disease activity.

References

1. PMID: 12692048. (metadata not in corpus)

2. Azzopardi N, Ellul P. Risk factors for osteoporosis in Crohn's disease: infliximab, corticosteroids, body mass index, and age of onset. Inflamm Bowel Dis. 2013;19(6):1173-8. PMID: 23511037.

3. Hessov I, Mosekilde L, Melsen F, Fasth S, Hultén L, Lund B, Lund B, Sørensen OH. Osteopenia with normal vitamin D metabolites after small-bowel resection for Crohn's disease. Scand J Gastroenterol. 1984;19(5):691-6. PMID: 6332369.

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Draft, generated by the IBDology RAG and not yet clinician-reviewed. Answers are grounded in the retrieved literature listed above; a high faithfulness score means the answer matches its sources, not that the sources are correct.