Resumen

MENESES C, LUIS et al. Concordance between core percutaneous and surgical biopsies of breast lesions: Importance of lesion diameter. Rev Chil Cir [online]. 2007, vol.59, n.3, pp.191-197. ISSN 0718-4026.  http://dx.doi.org/10.4067/S0718-40262007000300005.

Background: Free-hand percutaneous core needle biopsy is the most commonly used preoperative diagnostic tool for palpable breast lumps. To obtain a reasonable success rate, the lesion needs to have a minimal diameter. Below that threshold, an alternative method such as the ultrasound-guided core needle biopsy is required. Aim: To define an objective lump diameter-based reference to select the most effective sampling method for percutaneous biopsy. Material end Methods: Retrospective review of medical records all core breast biopsies, followed by a surgical biopsy, performed between 2002 and 2006. The Automatic Interactions Detection (AID) segmentation technique, was used to analyze data. Results: One hundred and two procedures, performed in 100 breast lesions of 96 women, were analyzed. The concordance between core and surgical biopsy to identify the pathological type of malignant lesions was 86%. The procedure had a low efficiency for the diagnosis of benign lesions. The false-negative rate for cancer was 11%. The sensibility, specificity, positive predictive and negative predictive values were 86, 96, 99 and 69% respectively. The threshold diameter of the lesion to obtain a greater true-result rate was 31 mm. Below that diameter the number of false negative results increased. Conclusions: A good concordance between free hand core percutaneous and surgical biopsies was obtained when breast lesions had a diameter over 31 mm

Palabras clave : Core breast biopsy; breast cancer; breast lump.

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