[Evaluation of breast microcalcifications according to Breast Imaging Reporting and Data System (BI-RADS) and Le Gal's classifications].
OBJECTIVE
the aim of this study is to evaluate the accuracy of mammography in the diagnosis of suspicious breast microcalcifications, using BI-RADS and Le Gal's classifications.


METHODS
one hundred and thirty cases were selected with mammograms contain only microcalcifications of file and initially classified as suspicious (categories 4 and 5) without lesions clinical detectable and reclassified by two examiners, getting a consensus diagnosis. The biopsies were reviewed by two pathologists getting also a consensus diagnosis. Both, mammogram and histopathologic analysis were double blinded reviewed. Chi-square test, Fleiss-square statistic and EPI-INFO 6.0 were used in this study.


RESULTS
the correlation between histopathological and mammographic analysis using BI-RADS and Le Gal classification showed the same sensitivity of 96.4%, specificity of 55.9 and 30.3%, positive predictive value (PPV) of 37.5 and 27.5%, and accuracy of 64.6 and 44.6% respectively. The PPV by BI-RADS categories was: category 2, 0%; category 3, 1.8%; category 4, 30.8%; and category 5, 60%. The PPV by Le Gal classification was: category 2, 3.1%; category 3, 18.1%; category 4, 26.4%;category 5, 66.7%, and non classified 5.2%.


CONCLUSIONS
the results were better for the classification of BI-RADS, but it did not get to reduce the ambiguity in assessment of breast microcalcifications.
Resende
Lúcio Márcio Perri de
LM
Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. lucioperri@uai.com.br
Matias
Marco Antônio Rodrigues Freire
MA
Oliveira
Gracinda Maria Baltazar de
GM
Salles
Márcio Almeida
MA
Melo
Frederico Henrique Corrêa
FH
Gobbi
Helenice
H
D001941:Breast Diseases / Q000145:classification / Q000000981:diagnostic imaging* / Q000473:pathology*; D002114:Calcinosis / Q000145:classification / Q000000981:diagnostic imaging* / Q000473:pathology*; D005260:Female; D006801:Humans; D008327:Mammography; D012189:Retrospective Studies; D012680:Sensitivity and Specificity