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- Gustavsson, Anders, 1964-, et al.
(författare)
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Smoking is a risk factor for recurrence of intestinal stricture after endoscopic dilation in Crohn's disease
- 2013
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Ingår i: Alimentary Pharmacology and Therapeutics. - : Wiley-Blackwell. - 0269-2813 .- 1365-2036. ; 37:4, s. 430-437
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Endoscopic balloon dilation is an efficacious and safe alternative to surgery as treatment of short intestinal strictures in Crohn's disease (CD). Factors predicting outcome of the procedure are not well described.AIM: To evaluate whether smoking at diagnosis, treatment with azathioprine, or other clinical variables may affect clinical outcome after endoscopic dilation. The endpoint was requirement of a new intervention such as dilation or surgery with intestinal resection or strictureplasty.METHODS: Retrospective study of 83 patients with CD who underwent endoscopic balloon dilation of an intestinal stricture between 1987 and 2009.RESULTS: After index dilation 55/83 patients underwent a new intervention. Among current smokers, 31/32 (97%) underwent another intervention compared to 18/33 (55%) among never smokers (adjusted HR: 2.50, 95% CI: 1.14-5.50, P = 0.022). After 5 years, cumulative probability of new intervention was 0.81 in smokers compared to 0.52 in never smokers; difference 0.29 (95% CI: 0.07-0.52, P = 0.01). In 16 patients, therapy with azathioprine was initiated before or shortly after the index dilation; 7/16 underwent a new intervention compared to 48/67 of those without azathioprine (HR: 0.46, 95% CI: 0.21-1.03, P = 0.06). After adjustment for other variables, the association was even weaker (HR: 0.80, 95% CI: 0.29-2.18, P = 0.668). Sex, age at diagnosis, age at first dilation, balloon size, location of stricture, and treatment period did not influence outcome.CONCLUSIONS: Smoking doubles the risk of recurrent stricture formation requiring a new intervention after index dilation. Maintenance therapy with azathioprine did not influence the subsequent course and need for a new intervention.
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| 65. |
- Göranzon, C., et al.
(författare)
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Immunohistochemical characterization of lymphocytes in microscopic colitis
- 2013
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Ingår i: Journal of Crohn's and Colitis. - : Elsevier. - 1197-4982 .- 1873-9946. ; 7:10, s. e434-e442
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Tidskriftsartikel (refereegranskat)abstract
- Background and Aims: Microscopic colitis (MC), encompassing the subgroups collagenous colitis (CC) and lymphocytic colitis (LC), is characterized by macroscopically normal or near-normal colonic mucosa, and an increased number of intraepithelial lymphocytes (IELs) and mononuclear cell infiltration in the underlying lamina propria (LP), in addition to an increased collagen layer in CC. This study aimed to characterize the inflammatory cells involved in mucosal inflammation, using immunohistochemistry.Methods Paraffin-embedded biopsies from 23 untreated patients with MC (CC = 13, LC = 10) and 17 controls were stained with antibodies against CD3, CD4, CD8, CD20, CD30, Foxp3, CD45RO and Ki67. Computerized image analysis was used to calculate areas of stained lymphocytes in the surface and crypt epithelia as well as in the LP.Results In CC and LC, an increase of predominantly CD8+ lymphocytes was seen in both the epithelium and the lamina propria, whereas a decreased amount of CD4+ lymphocytes was found in the lamina propria. CD45RO+ and Foxp3+ cells were more abundant in all areas in both patient groups compared to controls, as were CD20+ areas, although more scarce. Ki67+ areas were only more abundant in the epithelium, whereas CD30+ areas were more abundant in the lamina propria of both patient groups compared to controls.Conclusions This study confirms an increased amount of CD8+ lymphocytes in the epithelium. Lymphocytic proliferation and activation markers were more abundant, whereas a decreased amount of CD4+ lymphocytes was seen in the LP. Further studies are needed to reveal the underlying mechanism(s).
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- Halfvarson, Jonas, 1970-, et al.
(författare)
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Inflammatory bowel disease in a Swedish twin cohort : a long-term follow-up of concordance and clinical characteristics
- 2003
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Ingår i: Gastroenterology. - : Elsevier BV. - 0016-5085 .- 1528-0012. ; 124:7, s. 1767-1773
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND & AIMS: In 1988, we reported the first twin study in inflammatory bowel disease. The aim of the current study was to follow up these twins regarding new cases of inflammatory bowel disease and Crohn's disease characteristics using the Vienna classification.METHODS: The official Swedish population register and the cause of death register were used to search for the twins. All living patients were interviewed.RESULTS: Three monozygotic twins earlier classified as healthy had been diagnosed with inflammatory bowel disease (ulcerative colitis, n = 2; Crohn's disease, n = 1). Retrospectively, all 3 were symptomatic at the original survey. This changed the pair concordance in monozygotic twins from 6.3% to 18.8% in ulcerative colitis and from 44.4% to 50.0% in Crohn's disease. A high degree of concordance regarding age at diagnosis, disease location at diagnosis and during the course, and disease behavior was found in concordant monozygotic twin pairs with Crohn's disease. Seven of 9 pairs were identical in 3 or more of these disease characteristics compared with an expected number of 1.5 (P = 0.000076).CONCLUSIONS: This study confirms that the genetic influence is stronger in Crohn's disease than in ulcerative colitis. A remarkable phenotype similarity within concordant pairs with Crohn's disease was found using the Vienna classification.
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