MR imaging of paragangliomas

Olsen, W L; Dillon, William P.; Kelly, W. M.; Norman, David; Brant‐Zawadzki, Michael; Th, Newton

doi:10.2214/ajr.148.1.201

Cited by 249 publications

(103 citation statements)

References 6 publications

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“…Magnetic resonance imaging of the tempo ral bone, when performed, may reveal a pathognomonic saltandpepper pattern as described by Olsen et al 33 in paragangliomas larger than 2 cm. Otherwise, the lesion has been noted to show hypointensity to muscle on T1 weighted imaging and heterogeneous enhancement with Gd contrast injection.…”

Section: Preoperative Evaluationmentioning

confidence: 75%

Atypical tumors of the facial nerve: case series and review of the literature

Ross

Drazin

Eboli

et al. 2013

FOC

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Object The authors present a series of 4 patients with rare facial nerve tumors. The relevant literature is reviewed and is discussed regarding diagnostic features, the role of operative management, and surgical approach. Methods A retrospective chart review was conducted for patients with tumors of the facial nerve that were treated between 2008 and 2011. Patients undergoing observation with serial MRI and those who were treated with up-front radiosurgery and for whom tissue diagnosis was not available were excluded. In addition, patients with suspected vestibular schwannoma, facial nerve schwannoma, neurofibromatosis Type 2, and metastatic disease were also excluded. The charts of 4 patients (2 men and 2 women) with “atypical” tumors were reviewed and analyzed. Results A total of 12 patients with tumors of the facial nerve were identified during the study period. Patient characteristics, preoperative imaging, operative approach, tumor histology, and outcomes are described. Conclusions Atypical facial nerve tumors must be distinguished from the more common facial nerve schwannoma. How the authors of this study treat rare facial nerve tumors is based on their experience with the more common facial nerve schwannomas, characterized by a slow progression of symptoms and growth. Less is known about the rare lesions, and thus a conservative approach may be warranted. Open questions include the role of radiosurgery, facial nerve decompression, and indications for resection of tumor and cable grafting for these rare lesions.

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Section: Preoperative Evaluationmentioning

confidence: 75%

Atypical tumors of the facial nerve: case series and review of the literature

Ross

Drazin

Eboli

et al. 2013

FOC

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“…Lesions larger than 2 cm show salt-andpepper pattern of hyperintensity and hypointensity on T1 and T2-weighted images. 63 The salt component corresponds to the stromal elements and pepper component to flow voids ( Figs 8A and B). These findings indicate hypervascularity of the lesion and are highly suggestive of paraganglioma.…”

Section: Paragangliomamentioning

confidence: 99%

MRI of Lateral Skull Base Lesions

Patkar¹,

Yanamandala²,

Pardhi³

et al. 2011

An International Journal of Otorhinolaryngology Clinics

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This article reviews the role of magnetic resonance imaging (MRI) in the evaluation of lateral skull base lesions. Due to superior soft tissue resolution and multiplanar capability, MRI provides accurate information and exquisite anatomical detail. Thus, it guides the surgeon in proper preoperative planning regarding the approach of a lesion. MRI is also useful in post-treatment follow-up to assess the therapeutic response and to identify potential complications. We discuss the relevant anatomy, indications of MRI and MR pulse sequences used in the diagnosis of lesions of lateral skull base. Characteristic MRI findings of various lesions which help to arrive at a specific diagnosis as well as pitfalls of MRI which may confound the diagnosis are described. Newer MR pulse sequences enable image-guided surgery, which assist the surgeon intraoperatively, are briefly discussed. In summary, this article emphasizes the role of MRI in providing a specific answer to a clinical problem and its ability to guide the clinician for better management of patients.

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“…Paragangliomas typically show flow voids in SE imaging, 22 but this feature is limited to lesions that are Ͼ10 mm. 18 In this study, conventional MR imaging showed flow voids in 5 other tumors.…”

Section: Figmentioning

confidence: 99%

Head and Neck Paragangliomas: Value of Contrast-Enhanced 3D MR Angiography

Neves¹,

Huwart²,

Jourdan³

et al. 2008

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE:A rapid and accurate MR imaging technique would be beneficial to assess paragangliomas in the head and neck and to distinguish them from other lesions. The purpose of this study was to determine whether the combination of elliptic centric contrast-enhanced MR angiography (CE-MRA) and unenhanced and enhanced spin-echo imaging (conventional MR imaging) is more accurate than conventional MR imaging alone to assess paragangliomas in the head and neck.

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MR imaging of paragangliomas

Cited by 249 publications

References 6 publications

Atypical tumors of the facial nerve: case series and review of the literature

Atypical tumors of the facial nerve: case series and review of the literature

MRI of Lateral Skull Base Lesions

Head and Neck Paragangliomas: Value of Contrast-Enhanced 3D MR Angiography

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