Abstract:
:This study was aimed at comparing screen-detected and symptomatic breast carcinomas with regard to the prevalence of positive immunostaining for c-erb-B-2 oncoprotein. Paraffin sections of 81 breast carcinomas detected through the National Screening Programme were examined for the over-expression of c-erbB-2 oncoprotein using the avidin-biotin immunoperoxidase technique and 2 different specific antibodies: 21N and 4D5. Twenty-one other carcinomas detected in symptomatic patients were similarly examined for comparison. The screen-detected lesions were of 2 types: palpable and impalpable which required needle localization prior to surgical removal. Of the 81 screen-detected tumours, only 8 were c-erbB-2 positive, compared with 5 out of 21 non-screen-detected tumours. When only invasive carcinomas were considered, 5 out of 63 screen-detected cases were positive, compared with 5 out of 15 symptomatic cases. Four out of the 5 screen-detected positive invasive carcinomas were clinically palpable. Our results show an obvious trend towards a lower prevalence of c-erbB-2 oncoprotein over-expression in screen-detected carcinomas. As this over-expression is thought to be associated with increased tumour aggressiveness, the findings suggest a low prevalence of aggressive tumours in screen-detected lesions, particularly impalpable invasive carcinomas, identified so far.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Soomro S,Taylor P,Shepard HM,Feldmann M,Sinnett HD,Shousha Sdoi
10.1002/ijc.2910550112subject
Has Abstractpub_date
1993-08-19 00:00:00pages
63-5issue
1eissn
0020-7136issn
1097-0215journal_volume
55pub_type
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