“We were interested in finding out just how effective mammography and sonography were, when used together, in excluding breast cancer in women with palpable findings,” said Erica Tyler, MD, lead author of the study. “Our study differs from others because after enrollment, we followed patients for at least 3 years to see if any of the palpable lumps later were diagnosed as malignant,” she said.
The study evaluated 414 palpable breast lesions using both mammography and sonography. Imaging of 167 lesions was negative, with normal appearing breast tissue in the area of clinical concern and no mammographic or sonographic findings to explain the palpable finding. Among the 167 women with negative mammography and sonography, 120 reached a diagnostic endpoint with 28 patients undergoing a biopsy that showed no malignancy and 92 patients showing no malignancy after follow-up of at least 36 months. There were 118 true-negative and two false-negative cases said Dr. Tyler. The NPV when using mammography and sonography together was 98%, she said.
The study showed that both false-negative lesions “became increasingly suspicious on clinical exam and later became apparent by imaging,” said Dr. Tyler. One false-negative lesion occurred in a patient with heterogeneously dense tissue and was diagnosed 74 months after initial clinical discovery. The second false-negative lesion occurred in extremely dense tissue and was diagnosed 81 months after initial discovery.
“Our findings support those reported in other studies. Uncommonly, palpable malignancies may not be detectable on both mammography and sonography, and this combination of imaging doesn’t rule out malignancy,” said Dr. Tyler. “Also, based on our findings, long term clinical and imaging follow-up of over five years may be needed to diagnose all palpable cancers, when the initial mammogram and sonogram are unrevealing,” she said.
Necoya Tyson | EurekAlert!
The importance of biodiversity in forests could increase due to climate change
17.11.2017 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Win-win strategies for climate and food security
02.10.2017 | International Institute for Applied Systems Analysis (IIASA)
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
22.11.2017 | Medical Engineering
22.11.2017 | Materials Sciences
22.11.2017 | Health and Medicine