Objective:

To correlate ultrasonographic and histopathological diagnosis in patients categorized as breast imaging reporting and data system (BI-RADS) 4.

Method:

Cross-sectional study, performed on patients with BI-RADS 4 (A, B or C) diagnosed by ultrasonography in the high specialty medical unit, hospital of specialties, Centro Médico Nacional General de División Manuel Ávila Camacho, of the Instituto Mexicano del Seguro Social. Age, ultrasonographic and histopathological diagnosis, menarquia, menopause, gestations, lactation, use of contraceptives and family history of breast cancer were evaluated.

Results:

101 patients categorized BI-RADS 4 were included; average age was 53.0 ± 8.3 years old, 6.9% of the patients were nulliparous, 92.2% with positive breastfeeding and 25.7% had a family history of breast cancer. By ultrasonography, 55.4% of the cases were BI-RADS 4A, 22.8% 4B and 21.8% 4C. 75.2% of the biopsies performed on the patients were benign and 24.8% were malignant. The overall ultrasonographic-histopathological concordance index was 0.25; 0.11 for BI-RADS 4A, 0.22 for BI-RADS 4B and 0.63 for BI-RADS 4C.

Conclusion:

The ultrasound-histopathological correlation is weak and inferior to that reported in the literature.