The Effect of Chemotherapy on Estradiol Levels in Patients with HER 2-Overexpression Breast Cancer in Dr Moewardi General Hospital, Surakarta, Indonesia

Imam Hafidh Zaini; Widyanti Soewoto; Ida Bagus Budhi

doi:10.3889/oamjms.2021.6967

Authors

Imam Hafidh Zaini Department of Surgery, Faculty of Medicine, Universitas Sebelas Maret, Surakarta, Indonesia
Widyanti Soewoto Department of Surgery, Oncology Division, Faculty of Medicine, Universitas Sebelas Maret, Surakarta, Indonesia
Ida Bagus Budhi Departement of Surgery, Digestive Division, Faculty of Medicine, Universitas Sebelas Maret, Surakarta, Indonesia

DOI:

https://doi.org/10.3889/oamjms.2021.6967

Keywords:

Breast cancer, HER2 overexpression, Estradiol levels, Adjuvant chemotherapy, Developing country

Abstract

AIM: This study aims to evaluate the effect of adjuvant chemotherapy on estradiol levels in patients with HER 2-overexpression breast cancer in a developing country.

METHODS: This comparative study with pre- and post-design model observation approach, involving patients with HER 2-overexpression breast cancer who had undergone surgery and had never received chemotherapy or hormonal therapy before, who were then given adjuvant chemotherapy. Estradiol levels were measured before and after chemotherapy. The study was carried out in the surgical oncology division of RSUD Dr. Moewardi (RSDM) Surakarta from January 2020-December 2020. Descriptive data are presented in a frequency table based on age, menstrual status, parity status, breastfeeding status, contraception, contraception duration, family history, stage, and histological grade. Before and after chemotherapy in patients with breast cancer, the estradiol levels employed the paired sample t-test of the Wilcoxon rank test because the data did not meet the normality assumption.

RESULTS: From the total data of 21 patients, 15 patients experienced a decrease in estradiol levels after chemotherapy, while six patients underwent an increase. The mean estradiol level before chemotherapy was 89.41 pg/ml, whereas the mean estradiol level after chemotherapy was 55.90 pg/ml. It indicates a difference in the decrease in estradiol levels of 33.51 pg/ml. The statistical test results also obtained a p-value of = 0.033 (p < 0.05), which signifies a significant difference between estradiol levels before and after chemotherapy. Thus, chemotherapy is effective in lowering estradiol levels in patients with breast cancer.

CONCLUSION: Chemotherapy affects decreasing estradiol levels in patients with HER2 overexpression breast cancer.

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