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Magnetic resonance and diffusion weighted imaging findings of head and neck paragangliomas
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Original Article
VOLUME: 52 ISSUE: 3
P: 416-423
2019

Magnetic resonance and diffusion weighted imaging findings of head and neck paragangliomas

Acta Haematol Oncol Turc 2019;52(3):416-423
DOI: 10.5505/aot.2019.19971
Altan Güneş 1
Burce Ozgen 2
Elif Bulut 2
Nilda Süslü 3
Anil Barak Dolgun 4
Gaye Guler Tezel 5
Kader Oguz 2
1. University Of Health Sciences, Ankara Child Health And Diseases Hematology Oncology Training And Research Hospital, Department Of Radiology
2. Hacettepe University Faculty Of Medicine, Department Of Radiology
3. Hacettepe University Faculty Of Medicine, Department Of Otorhinolaryngology
4. Hacettepe University Faculty Of Medicine, Department Of Biostatistics
5. Hacettepe University Faculty Of Medicine, Department Of Medical Pathology
6.
No information available.
No information available
Received Date: 2019-03-31T12:56:03
Accepted Date: 2019-12-27T14:26:24
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Abstract

INTRODUCTION

To evaluate magnetic resonance (MRI) and diffusion weighted imaging (DWI) characteristics of head and neck paragangliomas and to compare the apparent diffusion coefficient values (ADCV) of the paragangliomas.

METHODS

The study was approved by the local ethics committee. We retrospectively reviewed the medical and imaging records of 39 consecutive patients (male/female=7/32; mean age=52.9±13.8 years, range 19–79 years) with paragangliomas between January 2011 and January 2017. All MRI were evaluated for tumor location, size, signal intensity and homogeneity, the presence of salt and pepper (S&P) appearance, contrast enhancement degree, and the ADCV. The paragangliomas were grouped as neck (carotid body tumor [n=12] and glomus vagale [n=1]) and head (glomus jugulare [n=13], tympanicum [n=2],and jugulotympanicum [n=11]) lesions and MRI features were also compared between these groups. Inter-observer agreements for ADCVs were estimated by using the intraclass correlation coefficient.

RESULTS

The paragangliomas showing S&P appearance had larger diameters than those did not (p<0.001). The paragangliomas located in the head had larger diameters and lower T2 signal intensity than those located in the neck (p≤0.023). DWI signal intensity of tumors located in the neck were lower than those located in the head (p=0.033). The mean ADCV of all paragangliomas was 0.89±0.50×10−3 mm2/s, with no significant differences identified among the paragangliomas (p=0.127). Inter-observer reliability was found to be substantial to excellent (intraclass correlation coefficient range, 0.78–0.89).

DISCUSSION AND CONCLUSION

The localization and sizes of paragangliomas affect the presence of S&P apperance, DWI and T2 signal intensity. The addition of ADCV of paragangliomas to conventional MRI findings may increase the accuracy of imaging in distinguishing other head and neck lesions.