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,

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Presentation transcript:

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 en... 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. M. Okahara et al. AJNR Am J Neuroradiol 2006;27:700-704 ©2006 by American Society of Neuroradiology