title: Immunohistochemical expression of c-erbB-2 oncoprotein and EGF-R in pre- and postmenopausal breast cancer.
abstract: Tissues from 40 cases each of premenopausal and postmenopausal breast cancer were studied immunohistochemically for epidermal growth factor receptor (EGF-R) and c-erbB-2 oncoprotein. In the premenopausal group, immunopositivity for c-erbB-2 was 15% and for EGF-R 22.5%, whereas in the postmenopausal group, 45% of cases were positive for c-erbB-2 and 42.5% for EGF-R. The difference in immunoexpression of c-erbB-2 between the two groups was significant. A significant correlation was observed between the concomitant expression of c-erbB-2 as well as EGF-R and lymph node involvement. Furthermore, an association was found between c-erbB-2 positivity and histological grading of the tumour. It is interesting that the pattern of the investigated parameters indicates the difference in the pathological events of pre- and postmenopausal breast cancer.
authors.affiliation: G.B. Pant Hospital, New Delhi, India.
authors.forename: N
authors.initials: N
authors.lastname: Ratnakar
authors.forename: B K
authors.initials: BK
authors.lastname: Sharma
authors.forename: K U
authors.initials: KU
authors.lastname: Chaturvedi
authors.forename: S
authors.initials: S
authors.lastname: Kaur
authors.forename: S L
authors.initials: SL
authors.lastname: Naik
authors.forename: A
authors.initials: A
authors.lastname: Ray
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D066246:ErbB Receptors / Q000096:biosynthesis*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D017698:Postmenopause; D017697:Premenopause; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000096:biosynthesis*
chemical_list: D014408:Biomarkers, Tumor; D066246:ErbB Receptors; D018719:Erb-b2 Receptor Tyrosine Kinases