Analysis of the effectiveness of primary treatment of stage IA–IIA ovarian cancer. Siberian Journal of Oncology

Aim : to determine the effectiveness of primary treatment of patients with ovarian cancer of stages IA–IIA. Material and Methods . The study included 336 (100 %) patients with histologically confrmed ovarian cancer of stages IA–IIA, who were treated at the Primorsky Regional Oncology Center from 2004 to 2021. The overall survival (s) and progression-free survival (PFS) were analyzed depending on clinical and morphological factors: histological type of cancer, BRCA1/2 mutation, profle of the clinic where surgical treatment was performed, surgical staging and chemotherapy option. The examination for a mutation in the BRCA1/2 gene was performed by a new generation sequencing method. The data were statistically processed using the IBM SPSS Statistics 26 program. Results . The average age of patients with stage IA–IIA ovarian cancer was 52.12 ± 12.13 years. Statistically signifcantly higher survival rates were in patients with histological tumor type low-grade serous carcinoma compared with high-grade serous carcinoma (S: p=0.010 and IBP: p=0.020), with surgical treatment in specialized hospitals compared with patients operated in gynecological hospitals (s: p=0.040 and IBP: p=0.020), during adequate surgical staging (OV: p=0.008 and IBP: p=0.010), during treatment with platinum and taxanes (OV: p=0.001 and IBP: p=0.001). Conclusion . It was shown that about 30 % of patients with stage IA–IIA ovarian cancer in Primorsky Krai received primary surgical treatment in non-specialized hospitals, which increased the risk of progression and death by 1.7 times. A low percentage of adequate surgical staging was noted (12.5 %). Adjuvant chemotherapy with platinum and non-oxane agents worsened the prognosis of the disease. Patients with low-grade serous carcinoma had a more favorable prognosis (by 60 %). There was no statistically signifcant effect of the presence of a mutation in the BRCA1/2 genes on survival rates.