AJDRAJNR - American Journal of Neuroradiology

This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Okahara, M.
Right arrow Articles by Kondo, Y.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Okahara, M.
Right arrow Articles by Kondo, Y.

Basal Cell Adenoma of the Parotid Gland: MR Imaging Findings with Pathologic Correlation

M. Okaharaa, H. Kiyosuea, S. Matsumotoa, Y. Horia, S. Tanouea, D. Uchidaa, H. Moria and Y. Kondob

a Department of Radiology, Oita University Faculty of Medicine, Oita, Japan
b First Department of Pathology, Oita University Faculty of Medicine, Oita, Japan


Figure 1
View larger version (83K):

[in a new window]
  		Fig 1. A 82-year-old man with basal cell adenoma (BCA) (membranous type, marked enhancement)

A, A T1-weighted image (T1WI) shows a homogeneously low-SI mass with a well-defined, smooth margin in the superficial lobe of the left parotid gland.

B, On T2WI, the tumor shows slightly lower SI than the normal parotid gland.

C, On Gd-enhanced fat-suppressed T1WI, the tumor shows homogeneous and strong enhancement.

D, On dynamic study, the tumor shows a rapid and prolonged enhancement pattern.

E, Microscopic examination (hematoxylin-eosin stain [H&E]) shows conspicuous hyaline matrix surrounding epithelial cells. Relatively large vessels are seen in the tumor (arrows).


Figure 2
View larger version (69K):

[in a new window]
  		Fig 2. A 68-year-old woman with basal cell adenoma (BCA) (solid type, large cystic change)

A, A T1-weighted image (T1WI) shows a homogeneously low-SI mass with well-defined and smooth margin in the deep lobe of the right parotid gland.

B, On T2WI, the tumor shows slightly lower SI than the normal parotid gland with very high SI (cystic change) at the anterior half of the tumor.

C, On Gd-enhanced T1WI, the tumor shows homogeneous moderate enhancement of the solid component. On T2WI, a very-high-SI area is not enhanced.

D, Microscopic examination (hematoxylin-eosin stain [H&E]) shows a solid pattern with many microcystic changes around a large cystic change. Dilated vascular channels are prominent.


Figure 3
View larger version (92K):

[in a new window]
  		Fig 3. A 69-year-old woman with basal cell adenoma (BCA) (trabecular type)

A, A T1-weighted image (T1WI) shows a homogeneously low-SI mass with a well-defined, smooth margin in the left parotid gland.

B, On Gd-enhanced T1WI, the tumor shows inhomogeneous moderate enhancement.

C, On dynamic study, the tumor shows rapid enhancement at the periphery of the tumor and is gradually enhanced from the periphery to central part of the tumor.

D, Microscopic examination (hematoxylin-eosin stain [H&E]) shows a trabecular pattern of a BCA. The tumor is composed of small uniform basaloid cells (arrowheads) arranged in solid or trabecular pattern. The stroma is loose, scantily collagenous tissue. There is characteristic palisading (arrows) in the peripheral portion of the tumor cell nests.





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X