title: Vitamin D deficiency and bone disease in patients with Crohn's disease.
abstract: The prevalence of vitamin D deficiency in Crohn's disease and the relationship of vitamin D status to metabolic bone disease have not been fully characterized. Serum 25-hydroxyvitamin D was measured in 82 patients with Crohn's disease; 65% of Crohn's disease patients had a low serum 25-hydroxyvitamin D concentration; 25% had deficient levels (less than 10 ng/ml). The lowest 25-hydroxyvitamin D levels were observed in patients with previous ileal resections. Nine patients were studied in detail including transiliac needle bone biopsies; 6 had osteomalacia and 3 osteoporosis. Six patients had repeat bone biopsies 9 to 18 mo after vitamin D treatment. Three patients with osteomalacia and low serum 25-hydroxyvitamin D levels showed histologic improvement after therapy with oral vitamin D restored serum 25-hydroxyvitamin D levels to normal. The adequacy of therapy was assessed accurately by monitoring serum 25-hydroxyvitamin D concentration. Three patients with metabolic bone disease with normal serum 25-hydroxyvitamin D levels at diagnosis did not show histologic improvement after receiving vitamin D.
mesh_terms: D015652:25-Hydroxyvitamin D 2; D000328:Adult; D000368:Aged; D001851:Bone Diseases, Metabolic / Q000150:complications* / Q000188:drug therapy / Q000473:pathology; D001842:Bone and Bones / Q000473:pathology; D003424:Crohn Disease / Q000097:blood / Q000150:complications* / Q000473:pathology; D004872:Ergocalciferols / Q000031:analogs & derivatives / Q000097:blood; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010018:Osteomalacia / Q000150:complications; D014807:Vitamin D / Q000627:therapeutic use; D014808:Vitamin D Deficiency / Q000150:complications* / Q000188:drug therapy
chemical_list: D004872:Ergocalciferols; D014807:Vitamin D; D015652:25-Hydroxyvitamin D 2