Basal cell adenoma of the parotid gland: MR imaging findings with pathologic correlation.
Basal cell adenoma of the parotid gland: MR imaging findings with pathologic correlation.
复制标题
腮腺基底细胞腺瘤：磁共振成像结果与病理相关性。
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Y. Kondo
中科院分区：
文献类型：
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作者：
M. Okahara;H. Kiyosue;Shoji Matsumoto;Yuzo Hori;S. Tanoue;D. Uchida;H. Mori;Y. Kondo
背景和目的
基底细胞腺瘤是腮腺的一种罕见肿瘤。只有少数病例报告描述了BCA的MR成像特征已被发表。本研究的目的是描述和表征腮腺基底动脉瘤的MR表现。
材料和方法
我们回顾性审查了1992年1月至2004年8月从我们的病理数据库中收集的8例（2名男性和6名女性;年龄范围，52-82岁）BCA的MR图像与病理相关性。由2名经验丰富的放射科医生对所有MR图像的边缘形态、信号强度（SI）和增强行为进行回顾性评价。
结果
病理检查：实性5例，小梁型2例，膜性1例。所有肿瘤边界清楚，轮廓光滑。囊性变4例。在T1 WI上，7例肿瘤呈均匀低信号，与肌肉信号相当，1例呈不均匀低信号。T2加权像（T2 WI）均显示略低于周围腮腺组织的信号强度。增强T1 WI上，6个肿瘤呈中度强化，1个呈膜性强强化。4例进行了动态研究。所有患者均表现为快速和持续增强。
结论
BCA的MRI表现为边界清晰、光滑，T11和T2 WI信号强度较低，动态增强扫描呈快速、长时间强化。虽然BCAs很罕见，但当肿瘤显示出本文所述的所有特征时，应怀疑它们。
BACKGROUND AND PURPOSE
Basal cell adenomas (BCAs) are rare tumors of the parotid gland. Only a few case reports describing MR imaging features of BCA have been published. The aim of this study was to describe and characterize the MR findings of BCAs of the parotid gland.
MATERIALS AND METHODS
We retrospectively reviewed MR images of BCA with pathologic correlation in 8 cases (2 men and 6 women; age range, 52-82 years) collected between January 1992 and August 2004 from our pathologic data base. All MR images were retrospectively evaluated with respect to the marginal morphology, signal intensity (SI), and enhancement behavior by 2 experienced radiologists.
RESULTS
On pathologic examination, 5 tumors were solid type, 2 were trabecular type, and 1 was membranous type. All of the tumors were well circumscribed with smooth contours. Cystic changes were seen in 4 cases. On T1-weighted images (T1WI), 7 tumors showed homogeneously low SI equal to muscle and one showed heterogeneously low SI. On T2-weighted images (T2WI), all of them showed slightly lower SI than that of surrounding parotid tissue. On gadolinium-enhanced T1WI, 6 tumors demonstrated moderate enhancement and one demonstrated strong enhancement (membranous type). Dynamic studies were performed in 4 cases. All showed rapid and prolonged enhancement.
CONCLUSION
MR imaging findings of BCA were well-defined and smooth marginal morphologies, relatively low SI on both T11W and T2WI, and rapid and prolonged enhancement on dynamic study. Although BCAs are rare, they should be suspected when a tumor shows all of the characteristics noted here.