title: [Level of estrogen receptors in breast tumors: role of ethnic factors].
abstract: Estrogen receptor levels have been assayed in breast cancer patients. A significant increase in receptor-negative tumors was found in Kazakh menopausal women. The proportion of receptor-positive tumors correlated inversely with tumor progression, irrespective of ethnicity. A significant rise in the incidence of receptor-negative tumors was recorded in Kazakh females with breast cancer stage III.
authors.affiliation: Kazakh Research Institute of Oncology and Radiology, Cabinet of Ministers of the Republic of Kazakhstan, Almaty.
authors.forename: S A
authors.initials: SA
authors.lastname: Baisheva
authors.forename: O G
authors.initials: OG
authors.lastname: Khan
authors.forename: Z I
authors.initials: ZI
authors.lastname: Togaĭbaeva
authors.forename: A N
authors.initials: AN
authors.lastname: Baĭmakhasheva
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology / Q000378:metabolism*; D018450:Disease Progression; D005260:Female; D006801:Humans; D015994:Incidence; D007623:Kazakhstan / Q000453:epidemiology; D017698:Postmenopause; D011960:Receptors, Estrogen / Q000378:metabolism*
chemical_list: D011960:Receptors, Estrogen