[Ultrasound guided core biopsy for breast lesions using 16G needle].
OBJECTIVE
The objective of this study was to develop a standard diagnostic evaluation with 16G core-needle biopsy for breast lesions. We evaluated the ideal number of fragments using standard ultrasound criteria based on the previous results obtained on the size of the lesions.


METHODS
A prospective study was carried out, from may 2004 to September 2005, in 79 patients with lesions that included categories 2,3,4 and 5, according to BIRADS -USTM using 16G core biopsy needle. We took up 5 pieces numbered and placed individually in vials with 10% formalin.


RESULTS
In 84 biopsies performed there were 81 conclusive diagnoses (96%), with 43 malignant results (51%) and 38 benign results (45%). The effectiveness of the core biopsy increased with the sample numbers: one sample is 95.24% accurate; two samples reach 96.93%; three samples reach 98.8%; four samples reach 98.81%, and finally, five samples reach 100% accuracy.


CONCLUSIONS
the resection of three fragments was sufficient for a satisfactory result.
Martins
Elizabeth Costa
EC
Pós-Graduação em Ginecologia da Santa Casa da Misericórdia do Rio de Janeiro, RJ, BR. elizabeth.martins@uol.com.br
Soares
Alkindar
A
Guimarães
Carlos Marques
CM
Freire
Maria de Nazaré Bastos da Serra
Mde N
Koch
Hilton
H
Marsillac
Martha
M
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008875:Middle Aged; D009339:Needles; D011446:Prospective Studies; D018084:Ultrasonography, Interventional; D055815:Young Adult