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  • Title: Factors associated with serum CA19-9 levels among healthy children: a cross-sectional study.
    Author: Kawai S, Oba-Shinjo SM, Ito LS, Uno M, Marie SKN, Hamajima N.
    Journal: BMC Clin Pathol; 2012 Dec 04; 12():23. PubMed ID: 23206543.
    Abstract:
    BACKGROUND: CA19-9 is a tumor marker mainly used for biliary tract, pancreas and colorectum. Since the marker applies usually for adults, the normal range of serum CA19-9 among children has been rarely reported. This is the first study reporting the distribution of serum CA19-9 levels among cancer-free children as well as their parents, taking into account the Lewis and secretor gene polymorphism and physical growth. METHODS: Study subjects were 972 apparently healthy Japanese Brazilians including 476 children aged from 1 to 19 years. RESULTS: The comparisons in five-year age groups demonstrated that the mean values of serum CA19-9 was lower in the boys than in the girls, and higher in younger age groups; 22.5 U/ml for 1-4 year-old (n=13), 17.4 U/ml for 5-9 year-old (n=36), 15.5 U/ml for 10-14 year-old (n=96) and 10.2 U/ml for 15-19 year-old (n=74) in boys, and 25.3 U/ml (n=11), 27.1 U/ml (n=50), 17.7 U/ml (n=105) and 13.5 U/ml (n=59) in girls, respectively. The difference in those geometric means was statistically significant among four age groups (p=0.006, ANOVA adjusted for sex). After Lewis and secretor genotypes, which are definitive factors of serum CA19-9, were taken into account, geometric mean of serum CA19-9 was associated with any of BMI (p<0.001), height (p<0.001) and weight (p<0.001) among children excluding those with le/le genotype. The associations were still significant when age was adjusted. CONCLUSIONS: Serum CA19-9 values were higher among children than among adults, and influenced by sex, height, weight, and BMI even after the adjustment for age as well as Le and Se genotypes.
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