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Un trabajo aparecido en el "Journal of the National Cancer Institute muestra que alrededor del 20% de los tumores mamarios detectados mediante mamografía no son invasivos. Se calcula que de este tipo de tumores se encuentra uno por cada 1.300 mamografías realizadas.
Los autores, de la Universidad de California, en San Francisco, analizaron datos médicos de más de medio millón de mujeres y un número de mamografías superior a las 650.000.
El estudio sugiere que la mamografía es más eficaz a la hora de detectar tumores no invasivos, el llamado carcinoma ductal in situ, que cánceres invasivos.
Journal of the National Cancer Institute 2002;94:1546-1554
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University of California, San Francisco