Association between ABO blood type and type I endometrial cancer: a retrospective study

This study aimed to assess the association between ABO blood type and incident of type I endometrial cancer (EC), as well as the stage and differentiation. 213 patients with type I EC and 300 healthy controls were included. As a result, the frequencies of A, B, O, and AB blood types among patients with type I EC were 51 (23.9%), 59 (27.7%), 93 (43.7%) and 10 (4.7%), respectively. There were no significant differences in age, body mass index, and other baseline covariates between groups of ABO blood types (p > .05). Logistic regression model showed that women with blood type O was more likely to develop type I EC than those with type A (odds ratio (OR): 1.66, 95% confidence interval (CI): 1.05-2.63). However, there was no significant association of ABO blood type with stage and differentiation of type I EC (p > .05). In conclusion, blood type O was the most prevalent ABO blood type among patients with type I EC and was associated with increased risk of type I EC, while ABO blood type was not significantly associated with stage or differentiation of type I EC.IMPACT STATEMENTWhat is already known on this subject? Previous studies have produced inconsistent findings on association of ABO blood type with EC. Those studies also did not explore the relationship between ABO blood type and stage or differentiation of type I EC.What the results of this study add? The present study showed that women with blood type O was more likely to develop type I EC than those with type A and there was no significant association of ABO blood type with stage or differentiation of type I EC.What the implications are of these findings for clinical practice and/or further research? Gynaecologists should pay more attention to women with blood type O, who should undergo more active EC screening.

Prognostic impact of ABO blood group on type I endometrial cancer in a population of Iranian patients

BACKGROUND

Inherited ABO blood group has been shown to play an important role in the pathogenesis of various gynecological cancers including endometrial carcinoma (EC).

OBJECTIVE

Our study aimed to determine the prevalence of ABO blood groups in Iranian patients with EC and to investigate the relationship between the blood group and several clinicopathologic parameters in Imam Hossein Hospital.

METHODS

One hundred and seventy-five EC patients were selected and analyzed for their clinicopathologic details including ABO blood group, age, menopausal status, body mass index (BMI), tumor grade, and stage of the International Federation of Obstetrics and Gynecology (FIGO).

RESULTS

Endometrioid carcinoma was the most common histological type in this case study. Early stages (I and II) were present in 135 individuals (77.1%) and advanced stages (III and IV) appeared in 40 (22.9%) patients. Blood group A was prominent in patients with EC. There was a significant relationship between blood group A and cancer grade (P= 0.024). 23.1% of group A had grade III EC, while this grade appeared in 35.2% of the non-A blood group. There was no significant association between ABO blood groups and other EC clinic-pathological results (P> 0.05).

CONCLUSION

Although there was no significant relationship between the ABO blood group and the patients' clinicopathological characteristics, more studies could provide extensive information about any possible relation between the blood group, especially blood group A, EC, and the grade of the tumor.