“…In this regard, mammography screening is confidently recommended for women over 50 years old, although women aged 40–50 years are also at risk of BC ( McDonald et al, 2016 ; Nelson et al, 2016 ; Phi et al, 2018 ). Various molecular subtypes of BC that require different therapy ( EBCTCG, 2015 ; Guerrero-Zotano & Arteaga, 2017 ; Lee & Seo, 2018 ), individual patient susceptibility to drugs and side effects from drugs ( Potosky et al, 2015 ; Greenlee et al, 2017 ; Moo et al, 2018 ) and the development of drug resistance ( Li et al, 2020 ; Zhong et al, 2020 ) make treatment of this disease more difficult and complicated. The listed difficulties indicate the need for study of new biomarkers that can help in the early detection, diagnosis and prognosis of BC.…”