Carcinoma ex pleomorphic adenoma of the parotid gland: radiologic-pathologic correlation with MR imaging including diffusion-weighted imaging.
نویسندگان
چکیده
We present 4 cases of carcinoma ex pleomorphic adenoma of the parotid gland. In 3 of the 4 cases, diffusion-weighted and apparent diffusion coefficient (ADC) mapping images clearly revealed carcinoma as a hypercellular area with low ADC values and pleomorphic adenoma as a hypocellular area with high ADC values. Diffusion-weighted images demonstrated well complex tissue components in carcinoma ex pleomorphic adenoma, which may be useful for the diagnosis of this disease.
منابع مشابه
Carcinoma ex pleomorphic adenoma of the parotid gland.
BACKGROUND Carcinoma ex pleomorphic adenoma (CXPA) is a rare aggressive epithelial malignancy arising from a primary or recurrent benign mixed tumor. Only a few case reports describing the radiologic features of CXPA have been published. PURPOSE To describe and characterize the magnetic resonance (MR) imaging findings of CXPA in the parotid gland and correlate them with pathologic findings. ...
متن کاملPleomorphic Adenoma in the Parotid Gland.
A retrospective analysis of the CT (n = 18) and MR (n = 4) examinations was performed in 21 patients with a histologically proven pleomorphic adenoma of the parotid gland. This group included 15 primary pleomorphic adenomas, 5 tumor recurrences and one carcinoma ex pleomorphic adenoma. There was a clear female predominance (15/21). On CT, pleomorphic adenoma usually presented as a well defined,...
متن کاملDiffusion-weighted echo-planar MR imaging of primary parotid gland tumors: is a prediction of different histologic subtypes possible?
BACKGROUND AND PURPOSE Our aim was to determine the value of echo-planar diffusion-weighted MR imaging (epiDWI) in differentiating various types of primary parotid gland tumors. MATERIALS AND METHODS One hundred forty-nine consecutive patients with suspected tumors of the parotid gland were examined with an epiDWI sequence by using a 1.5T unit. Image analysis was performed by 2 radiologists i...
متن کاملMR imaging of parotid tumors: typical lesion characteristics in MR imaging improve discrimination between benign and malignant disease.
BACKGROUND AND PURPOSE The surgical approach to parotid tumors is different for benign and malignant neoplasms, but the clinical symptoms do not correlate well with histology. Difficulties in tumor classification also arise in imaging modalities, in which sonography has the lowest and MR imaging, the highest accuracy. The purpose of this study was to review our experience using conventional MR ...
متن کاملEvaluating of Parotid Gland Tumours According to Diffusion Weighted MRI
The aim of this study is evaluating the contribution of diffusion-weighted MR imaging (DWI) in the final diagnosis of patient that parotid gland tumours has been determined. Fourty patients with 41 parotid masses were included to this study. The mean Apparent Diffusion Coefficient (ADC) values were calculated for all of lesions by performing DWI. 28 benign and 13 malignant tumours were detected...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- AJNR. American journal of neuroradiology
دوره 29 5 شماره
صفحات -
تاریخ انتشار 2008