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Breast, Mammography, Biopsy, Cancer, Neoplasia
E. Lopez Uzquiza1, M. Diez Blanco2, M. Drake Perez2, M. Sánchez Movellan2, S. M. Sanchez Gomez1, P. Merino Rasillo1; 1Suances/ES, 2Santander/ES
Methods and materials
Between January 2007 through December 2012,
a total of 151,567 women aged 50-69 participated in the Screening Program in Cantabria.
The mammogram modality chosen depended on their place of residence,
which means that women living in rural areas where explored with an analogue mammographic equipment installed in a mobile unit and those who lived in or nearby urban areas were screened with either direct digital or indirect digital mammography in fixed units.
Of the 151,567 screening mammograms,
17,025 were obtained using analogue mammography,
76,907 using direct digital mammography and 57,635 by indirect digital mammography.
A total of 111 interval breast cancers were diagnosed among the 151,567 women.
In the sixth round (between 2007 and 2008) 46,882 women were studied and 40 IC were diagnosed; in the seventh round (between 2009 and 2010),
50,639 women underwent mammogram and 34 IC were found and in the eighth round (between 2011 and 2012),
54,046 women were explored and the number of IC diagnosed were 37.
The IC rate per round was 0,85/1000,
0,67/1000 and 0,68/1000 in the sixth,
seventh and eighth round respectively with a global IC rate for the three rounds of 0.73 per 1000 screens.
Its distribution according subtype was: 49% true interval,
21% minimal sign,
7.2% false negative and 10% occult cancer.
A total of 14 cases (12.6%) were unclassified ( Table 2 ).