Head and neck paragangliomas: diffusion weighted and dynamic contrast enhanced magnetic resonance imaging characteristics. Issue 1 (December 2016)

• Record Type: Journal Article
• Authors: Yuan, Ying; Shi, Huimin; Tao, Xiaofeng
• Is Part Of: BMC medical imaging. Volume 16:Issue 1(2016)
• Page Start: 1
• Page End: 6
• Publication Date: 2016-12
• Subjects: Diagnostic imaging -- Periodicals; 616.075405
• DOI: 10.1186/s12880-016-0114-3
• Languages: English
• ISSNs: 1471-2342

Abstract

Abstract Background To determine the feature values of head and neck paragangliomas on diffusion-weighted imaging (DWI) and dynamic contrast enhanced (DCE) magnetic resonance imaging (MRI). Methods Patients with primary head and neck paraganglioma who underwent both DWI and DCE-MRI before treatment between January 2010 and June 2013 were identified. Two radiologists assessed apparent diffusion coefficient (ADC) values on DWI and kinetic characteristics on DCE-MRI. The time intensity curves (TICs) and dynamic parameters, including peak height (PH), maximum enhancement ratio (ERmax ), time to peak enhancement (Tpeak ) and maximum rise slope (Slopemax ), were generated and evaluated. Results Ten patients with head and neck paraganglioma were retrospectively analyzed. On conventional MRI, the tumors demonstrated as well-circumscribed, strongly enhanced lesions. Mean ADC value of the lesions was 1.12 ± 0.15 × 10−3 mm2 /s. The TICs demonstrated washout pattern (type-III) in all lesions. The mean PH, ERmax, Tpeak and Slopemax value was 121.24 ± 63.99, 193.79 ± 67.18, 8.16 ± 3.29 and 25.42 ± 7.91, respectively. Conclusions Head and neck paragangliomas demonstrate distinctive DWI and DCE-MRI results than for other benign tumors which should be taken into account in further evaluation of MRI on head and neck lesions.