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A study of interval breast cancer within the NHS breast screening programme

Lookup NU author(s): Dr Janine Gray

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Abstract

Aim-To define the biological nature and malignant potential of interval cancers presenting to a breast unit within the NHS breast screening programme. Methods-112 interval cancers were compared with matched, screen detected and symptomatic cancers in terms of their radiographic, histopathological, and immunohistochemical features. Results-Interval cancers, strictly defined, showed no characteristic radiographic pattern. In terms of size, vascular invasion, lymph node status, and prognosis they were intermediate between screen detected and symptomatic cancers. Within the interval cancers there was an excess of grade 1 and grade 3 tumours, and lesions with a high Ki67 index but immunohistochemistry otherwise failed to discriminate between the three groups. Inclusion of data from false negative "intenal cancers" did not significantly alter the results. Conclusions-Interval cancers are more aggressive than screen detected cancers but in general less aggressive than symptomatic cancers. However, within a heterogeneous group, occasional interval cancers are exceptionally malignant.

Publication metadata

Author(s): Gray JC; Cowan WK; Angus B; Lunt LG; Al-Tamimi SR

Publication type: Article

Publication status: Published

Journal: Journal of Clinical Pathology

Year: 2000

Volume: 53

Issue: 2

Pages: 140-146

ISSN (print): 0021-9746

ISSN (electronic): 1472-4146

Publisher: BMJ Publishing Group Ltd

URL: http://dx.doi.org/10.1136/jcp.53.2.140

DOI: 10.1136/jcp.53.2.140

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