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Less benign biopsies digital breast tomosynthesis

March 28, 2019 16:54

Digital breast tomosynthesis (CT) significantly reduces the frequency of biopsies for benign tumors without inhibiting cancer detection, according to the results of breast screening programs US National Health Service.

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"Currently, much attention is paid to whether to use CT as a screening tool, and there are many factors that must be considered in this situation", - says Dr. Nisha Sharma from Leeds teaching hospital NHS Trust in Leeds, England. "From a practical standpoint, TST can reduce the number of unnecessary biopsies for diagnostic conditions, increasing the accuracy of that radiologist interpreting mammograms".

As part of the screening program in the UK women should undergo preventive mammograms every three years between the ages of 50 to 70 years. Upon detection of anomalies they go to a clinical examination, further imaging and potential biopsy. TST is acceptable additional imaging technique, but it is not used in the usual screening.

Dr. Sharma and her colleagues compared the use of CT and its lack of 827 women selected for screening after a complete digital mammography (FFDM).

Among these women, it was revealed 145 cases of breast cancer (142 have been identified during the initial screening, only two types of cancer observed in DH and one - the MRI observation).

Researchers in Radiology, March 19, reported that the level of detection of cancer was 17.2% with and without the addition of DH.

As a result of screening without adding 571 DH was made biopsy which revealed 142 from cancer. The use of CT would lead only to the 298 biopsies, with 142 identified types of cancer.

As a result, the positive predictive value was higher than with CT (47,7%) than when the screening without DH (24.9%).

Specificity evaluation DH (77.5%) was approximately two times higher than with conventional screening (38.2%).

And DH and regular screening would miss two types of cancer, but all invasive cancers were identified with CT.

"CT is an important diagnostic imaging tool, as it helps to minimize the impact of imposition of tissues compared to conventional digital mammography, and can also help to reduce the masking effect," - said Dr. Sharma. "I think that the CG should be regularly used in diagnostic studies of women withdrew from the screening visit or symptomatic clinic, where a biopsy is considered on the basis of conventional imaging results."

"It is important to adhere to the triple assessment and CT imaging complements aspect of this process", - she said.

Dr. Per Skaane of Oslo University Hospital in Norway: "Uncertain seal in women with asymptomatic should not pass without a biopsy CT!"

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