Diagnostic value of gadolinium-enhanced dynamic MR imaging for parotid gland tumors |
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Authors: | Hazem M El Shahat Hadeer S FahmyGhada K Gouhar |
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Institution: | Department of Radiology, Faculty of Medicine, Zagazig University, Egypt |
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Abstract: | ObjectiveThis study aimed to evaluate the value of gadolinium-enhanced dynamic MR imaging for differentiating benign and malignant parotid gland tumors, and for characterizing the various histological types.Patients and methodsNon-enhanced T1-weighted (T1-W), fat-suppressed T2-weighted (T2-W), and gadolinium-enhanced fat-suppressed dynamic T1-weighted images were obtained preoperatively in 27 patients (28 parotid gland tumors), by using a 1.5 or 3 T MR imaging unit (GE, Signa Exite). The tumor margins and the enhancement curve patterns on dynamic MR imaging were analyzed. All patients underwent a parotidectomy with histopathologic analysis.ResultsPleomorphic adenomas depict a gradual enhancement pattern. Warthin’s tumors depict an early peak of enhancement and a high washout pattern. Malignant tumors depict an early peak of enhancement and a low washout pattern.ConclusionGadolinium-enhanced dynamic MR imaging improved the performance of MR imaging in differentiating benign from malignant parotid gland tumors and characterizing the different histological types of benign tumors. |
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Keywords: | Dynamic MR imaging Parotid gland tumors |
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