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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2016 ; 11
(3
): e0151262
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Risk of Gastrointestinal Cancers among Patients with Appendectomy: A Large-Scale
Swedish Register-Based Cohort Study during 1970-2009
#MMPMID26959234
Song H
; Abnet CC
; Andrén-Sandberg Ĺ
; Chaturvedi AK
; Ye W
PLoS One
2016[]; 11
(3
): e0151262
PMID26959234
show ga
BACKGROUND: Removal of the appendix might induce physiological changes in the
gastrointestinal tract, and subsequently play a role in carcinogenesis.
Therefore, we conducted a nationwide register-based cohort study in Sweden to
investigate whether appendectomy is associated with altered risks of
gastrointestinal cancers. METHODS: A population-based cohort study was conducted
using the Swedish national registries, including 480,382 eligible patients
followed during the period of 1970-2009 for the occurrence of site-specific
gastrointestinal cancer (esophageal/gastric/colon/rectal cancer). Outcome and
censoring information was collected by linkage to health and demography
registers. We examined the incidence of appendectomy in Sweden using data from
1987-2009. We also calculated standardized incidence ratios (SIRs) with 95%
confidence intervals (CIs) to estimate the relative gastrointestinal cancer risk
through comparison to the general population. RESULTS: We noted an overall
decrease in the age-standardized incidence of appendectomy among the entire
Swedish population from 189.3 to 105.6 per 100,000 individuals between 1987 and
2009. Grouped by different discharge diagnosis, acute appendicitis, incidental
appendectomy, and entirely negative appendectomy continuously decreased over the
study period, while the perforation ratio (18%-23%) stayed relatively constant.
Compared to the general population, no excess cancer risk was observed for
gastrointestinal cancers under study with the exception of a marginally elevated
risk for esophageal adenocarcinoma (SIR 1.32, 95% CI 1.09-1.58). CONCLUSIONS: In
Sweden, the incidence of appendectomy and acute appendicitis has decreased during
1987-2009. No excess gastrointestinal cancer risks were observed among these
appendectomized patients, with the possible exception of esophageal
adenocarcinoma.