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Contrast-Enhanced High-Resolution MRI of Invasive Breast Cancer: Correlation with Histopathologic Subtypes

Kakuya Kitagawa1, Hajime Sakuma1, Nanaka Ishida1, Tadanori Hirano2, Akinori Ishihara3 and Kan Takeda1

1 Department of Radiology, Mie University, School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan.
2 Department of Radiology, Matsusaka Central Hospital, 102 Kobo Kawaimachi, Matsusaka, Mie 515-8566, Japan.
3 Department of Pathology, Matsusaka Central Hospital, Mie 515-8566, Japan.



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  		Fig. 1A. —62-year-old woman with papillotubular carcinoma. Coronal contrast-enhanced T1-weighted fast low-angle shot (FLASH) image (TR/TE, 30/4) obtained 90 sec after injection of contrast medium shows irregular mass (arrow) in lateral part of right breast.

 


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  		Fig. 1B. —62-year-old woman with papillotubular carcinoma. On transverse contrast-enhanced T1-weighted FLASH image (30/4) obtained 5 min after contrast injection, linear enhancements (arrowheads) extending from mass are clearly depicted.

 


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  		Fig. 2A. —52-year-old woman with scirrhous carcinoma. Coronal contrast-enhanced T1-weighted fast low-angle shot (FLASH) image (TR/TE, 30/4) obtained 90 sec after injection of contrast medium shows polygonal mass (arrow) with serrated border in lateral part of left breast.

 


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  		Fig. 2B. —52-year-old woman with scirrhous carcinoma. Coronal contrast-enhanced T1-weighted FLASH image (30/4) obtained at same level as A 10 min after contrast injection reveals more prominent serrated border (arrowhead) than seen on A.

 


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  		Fig. 3A. —46-year-old woman with solid tubular carcinoma. Coronal contrast-enhanced T1-weighted fast low-angle shot (FLASH) image (TR/TE, 30/4) obtained 90 sec after injection of contrast medium shows round mass in medial part (arrow) of left breast.

 


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  		Fig. 3B. —46-year-old woman with solid tubular carcinoma. Coronal contrast-enhanced T1-weighted FLASH image (30/4) obtained at same level as A 10 min after contrast injection reveals rimlike enhancement (arrowhead) surrounding mass.

 


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  		Fig. 4. —Diagram shows diagnostic algorithm (generated by Answer-Tree 3.1 software, Statistical Package for the Social Sciences) used for classifying histopathologic subtype of invasive ductal carcinoma of no special type on basis of MRI features. IS = improvement score of breast MRI features in nodes of classification and regression tree.

 

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