Objective: The aim of this study was to predict the selection of treatment for ectopic pregnancy (EP) using the values of platelet/lymphocyte ratio (PLR), neutrophil/lymphocyte ratio (NLR), monocyte/lymphocyte ratio (MLR) and systemic immune inflammation index (SII) obtained from hematological parameters routinely used in clinical practice.

Design: Retrospective observational study.

Place & duration of study: This retrospective, cross-sectional study was conducted in the Department of Obstetrics and Gynecology of Konya City Hospital, between August 2020 and August 2022.

Methodology: The study included 140 patients who were diagnosed with EP in our hospital. The patients were separated as those who received medical treatment with methotrexate (MTX) (Group I) and those who underwent surgical procedures (Group II). The two groups were compared with respect to demographic characteristics and pre-treatment laboratory parameters.

Results: Of the 140 patients diagnosed with EP, 75 were in Group I, treated with MTX, and 65 were in Group II, treated with surgery. No significant difference was determined between the groups with respect to age, body mass index, and gravida-parity of the patients (p>0.05). The incidence of extrauterine mass, presence of yolk sac, and fetal heartbeat on ultrasonography was significantly higher in Group II than in Group I (p<0.05). NLR and MLR values in Group II were significantly lower than in Group I (p<0.05). The PLR value did not differ significantly between the groups (p>0.05). The SII value was significantly higher in Group II than in Group I (p<0.05).

Conclusion: NLR and MLR were found to be lower, and the SII was significantly higher in the patients who underwent surgery. Hematological parameters, especially SII, are potential markers that can be used in EP treatment selection.

Ectopic pregnancy, Systemic immune inflammation index, Platelet/lymphocyte ratio, Neutrophil/lymphocyte ratio, Monocyte/lymphocyte ratio NLR, PLR, MLR, SII, Methotrexate, MTX