A wide variety of dynamic contrast-enhanced MR appearances of breast cancer: pathologic correlation study.
OBJECTIVE
The aim of this study was to elucidate the characteristic magnetic resonance (MR) appearance of breast cancers, as well as, its variations and to investigate the pathology providing different patterns of dynamic-MR appearances.


METHODS
Fifty-two women with cancer underwent mastectomy (52 tumors resected) and had MR imaging at our institution between April 2001 and March 2004. MR images of T1WI, T2WI, dynamic-MRI and contrast-enhanced T1WI were obtained and evaluated. Dynamic-MR images were correlated with pathological findings.


RESULTS
Common MR appearance of breast cancer was a focal mass either with irregular or spiculated margins with similar signal intensity on T1WI as and similar to higher signal intensity on T2WI compared to the normal mammary gland. On static contrast-enhanced T1WI, apparent enhancement was typically observed. On dynamic MRI, tumor-rim-enhancement on an early phase image and washout enhancement pattern on dynamic images, both characteristic for breast cancer, were observed, however, the prevalence of them was relatively low, which could be explained by the variation of histopathology among breast cancer nodules.


CONCLUSIONS
In diagnosing breast masses on MRI, as well as the common and characteristic findings of breast cancer, the variations of MR findings and their underlying histopathology should also be considered.
Shiga University of Medical Science, Department of Radiology, Seta Tsukinowa-cho Otsu, Shiga 520-2192, Japan. m-rad-o@za2.so-net.ne.jp
Masayuki
M
Onishi
Akira
A
Furukawa
Masashi
M
Takahashi
Kiyoshi
K
Murata
D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology* / Q000601:surgery; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008408:Mastectomy; D008875:Middle Aged
D003287:Contrast Media; D019786:Gadolinium DTPA