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MR Mammary Ductography Using a Microscopy Coil for Assessment of Intraductal Lesions

Yoshihide Kanemaki1, Yasuyuki Kurihara1, Daisuke Itoh1, Ken Kamijo1, Yasuo Nakajima1, Mamoru Fukuda2 and Marc Van Cauteren3

1 Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki City, Kanagawa 216-8511, Japan.
2 Department of Surgery, St. Marianna University School of Medicine, Miyamae-ku, Kawasaki City, Kanagawa 216-8511, Japan.
3 Philips Medical Systems Corporation, Philips Bldg., 2-13-37 Kohnan, Minato-ku, Tokyo 108-8507, Japan.



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  		Fig. 1. —Photograph shows conventional surface coil (straight arrow) for MR mammography and microscopy coil (curved arrow) for MR ductography.

 


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  		Fig. 2A. —67-year-old woman with intraductal papilloma. Axial T1-weighted MR image using conventional surface coil shows hyperintense dilated duct (arrow).

 


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  		Fig. 2B. —67-year-old woman with intraductal papilloma. MR ductogram using microscopy coil obtained at same level as A shows two separate dilated ducts (curved arrow) and retroareolar mass (straight arrow) with intermediate signal intensity.

 


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  		Fig. 3A. —53-year-old woman with ductal carcinoma in situ. Conventional ductogram, craniocaudal view, shows cystic dilatation of mammary duct (arrow) with lobulated filling defect, which suggests intraductal lesion.

 


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  		Fig. 3B. —53-year-old woman with ductal carcinoma in situ. Axial T2-weighted MR image reveals dilatation of mammary ducts with two polypoid intraductal lesions (arrows). Note lactiferous sinus (arrowheads) just below nipple, measuring 1.5 mm in diameter.

 


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  		Fig. 4A. —68-year-old woman with mammary duct ectasia. Conventional ductogram, craniocaudal view, shows dilated mammary duct with questionable round filling defect (arrow) that is suggestive of inspissated secretions.

 


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  		Fig. 4B. —68-year-old woman with mammary duct ectasia. Axial T1-weighted mammary MR ductogram shows multiple dilated hyperintense mammary ducts with small filling defects (arrow) corresponding to thick secretions. Mammary duct ectasia with no intraductal lesions was confirmed at subsequent surgery.

 

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