The natural history of breast carcinoma

Autor: Hsiu-Hsi Chen, Bedrich Vitak, Laszlo Tabar, T. C. Prevost, Stephen W. Duffy
Rok vydání: 1999
Předmět:
Zdroj: Cancer. 86:449-462
ISSN: 1097-0142
0008-543X
DOI: 10.1002/(sici)1097-0142(19990801)86:3<449::aid-cncr13>3.0.co;2-q
Popis: BACKGROUND The availability of breast carcinoma data from trials of mammographic screening provides an opportunity to study the natural history of breast carcinoma. METHODS The Swedish Two-County study is a randomized, controlled trial of mammographic screening for breast carcinoma in which 77,080 women were randomized to receive an invitation to mammographic screening and 55,985 were randomized to receive no invitation. During the trial, a total of 2468 breast carcinoma cases were diagnosed. The authors examined the effect of screening on the pathologic attributes of the tumors diagnosed, mortality and survival from breast carcinoma, and the consequences of arresting tumor development by screening. RESULTS Screening reduces mortality from breast carcinoma largely through its effect in detecting tumors at a smaller size, decreasing the probability of lymph node metastases, and reducing the opportunity for worsening of the grade of malignancy of the tumor. CONCLUSIONS Breast carcinoma is not a systemic disease at its inception, but is a progressive disease and its development can be arrested by screening. The point at which the tumor's progression is arrested is crucial. Detection of small (
Databáze: OpenAIRE
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