Postexcisional breast magnetic resonance imaging in patients with breast cancer: predictable findings of residual cancer.
OBJECTIVE
The purposes of this study were to present magnetic resonance imaging (MRI) findings in patients with breast cancer soon after the excisional biopsy and before definitive surgery and to assess the diagnostic accuracy of MRI for prediction of residual cancer.


METHODS
Breast MRI was performed on 51 patients with breast cancer diagnosed by excisional biopsy. The morphologic type of postexcisional site was categorized into regular thin rim enhancement (P1), peripheral nodular enhancement (P2), satellite nodule within 2 mm from the cavity margin (P3), and irregularly thickened wall enhancement (P4). Enhancement pattern was categorized into "washout," "plateau," and "progressive" enhancement. All patients underwent definitive surgery after MRI. Magnetic resonance imaging findings were correlated with the pathologic findings.


RESULTS
The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of MRI for prediction of residual cancer were 92.1%, 69.2%, 78.4%, 88.6%, 56.3%, respectively.


CONCLUSIONS
MRI is a sensitive method for prediction of residual cancer after excisional biopsy.
Kim
Jeong-Ah
JA
Department of Radiology, Yonsei University College of Medicine, Seoul, Republic of Korea.
Son
Eun Ju
EJ
Kim
Eun-Kyung
EK
Kim
Min Jung
MJ
Kwak
Jin Young
JY
Jeong
Joon
J
D000328:Adult; D000368:Aged; D001706:Biopsy; D001943:Breast Neoplasms / Q000473:pathology* / Q000601:surgery; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D018365:Neoplasm, Residual / Q000175:diagnosis*; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity
D003287:Contrast Media; D019786:Gadolinium DTPA