Breast cancer molecular subtypes and receptor status among women at Potchefstroom Hospital: a cross-sectional study

The Pan African Medical Journal

Johanita Riétte Burger¹  Jesslee Melinda du Plessis¹  Prince Kasongo Mwila²  Kanishka²  Baudouin Kongolo Kakudji² 

[1] Medicine Usage in South Africa (MUSA), Faculty of Health Sciences, North-West University, Potchefstroom, South Africa;Department of Surgery, Potchefstroom Hospital, Potchefstroom, North West Province, South Africa;

关键词: breast cancer;    molecular subtypes;    receptor status;    potchefstroom;    south africa;    cross-sectional study;   

DOI  :  10.11604/pamj.2021.38.85.23039

来源: DOAJ

【 摘 要 】

INTRODUCTION: this study aimed to determine the prevalence of receptor status and molecular subtypes in women with breast cancer treated at Potchefstroom Regional Hospital, South Africa and to analyze the association of molecular subtypes with some clinicopathologic characteristics of the tumor. METHODS: the study population for this cross-sectional study consisted of 116 women with primary invasive breast cancer, treated at the hospital from 1st January 2012 to 31st December 2018. Molecular subtypes were classified by immunohistochemical surrogates as luminal A (estrogen receptor (ER) positive and/or progesterone receptor (PR) positive, HER2-; Ki-67 less than30%), luminal B HER2- (ER+ and/or PR+, HER2-; Ki-67 greater than or equal to 30%), luminal B HER2+ (ER+ and/or PR+, HER2+; any Ki-67), HER2 enriched (ER- and PR-, HER2+; any Ki-67), or triple-negative (ER-, PR-, HER2-, any Ki-67). RESULTS: the proportions of breast cancer receptor status of ER+, PR+ and HER2-, were 71.6%, 64.7% and 75.9%, respectively. The molecular subtypes of 29.3% of patients were luminal A-type, 24.1% were luminal B HER2-, 22.4% were triple-negative, 18.1% were luminal B HER2+ and 6% were HER2-enriched. Molecular subtypes was significantly associated with tumor grade (p =0.001; Cramér´s V=0.337), but independent of age (p=0.847), menopausal status (p=0.690), histology type (p=0.316), cancer stage (p=0.819), lymph node status (p=0.362), or tumor size (p=0.255). CONCLUSION: the study has revealed that most of the breast cancer in our setting was receptor-positive; approximately one-quarter were triple-negative. Furthermore, the study showed that luminal type A and B are the preponderant molecular subtypes. Molecular subtypes were associated with tumor grade but independent of age and menopausal status. The current study may assist in guiding the therapeutic strategy for patients with breast cancer in the Potchefstroom catchment area.

【 授权许可】

Unknown