An analytic retrospective review was conducted, in which VABB with DBT were carried out.
In the analyzed sample of our institution, women who presented percutaneous biopsies from the period January 2018 to July 2019 were included (n°= 688).
All patients were evaluated with 2D FFDM and DBT with CC and MLO views previous to the procedure. Every study was categorized according to criteria from BI RADS 5th edition by two radiologists specialized in breast imaging.
Imaging interpretation was carried out in work stations with 5 megapixels LCD Monitors, first examining 2D FFDM and displacement slide by slide for 3D images.
Patients who did not present Tomo Only lesions were excluded in this study.
The equipment employed was AMULET Innovality, Tomosynthesis 3D; and for sampling the system used was MAMMOTOME REVOLVE ST BIOPSY with 8 to 10-gauge needles, depending on the lesion, localization and breast density, obtaining an average between 12 to 15 samples (figures n°1 and n°2).
After positioning the patient, the DBT was carried out to localize the target or lesion to be biopsied. The lesion was marked digitally to be able to evaluate the depth (ie: z-axis), (figures n° 3A, B and C). Posteriorly the cutaneous antisepsis was performed, and the injection with local anesthesia with lidocaine 2% was administered (8 cc). A minimal incision with a scalpel was done, allowing the entrance of the needle. Then, it was positioned towards the target to be biopsied. The correct location of the lesion was found with Tomosynthesis. (figures n° 4 A, B, C, D)
In cases where the major part of the lesion was withdrawn, a clip was placed and its location was confirmed with another x-ray exposition.
The total number of necessary x-ray expositions for the whole procedure was 4.
Each of these samples was included in 10% formaldehyde.
The mean time taken to effectuate the procedure was of 11 minutes.