Glossopharyngeal schwannoma of the suprahyoid carotid space: Case report and discussion of the relationship to the carotid artery

Nagamine, Wayde H.; Conneely, Mark; Petruzzelli, Guy J.; Hacein‐Bey, Lotfi

doi:10.1002/lary.20063

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…Previous studies have reported that ICA dislocation serves as a diagnostic landmark. Prestyloid tumors often posteriorly displace the ICA, whereas retrostyloid tumors often anteromedially displace the ICA …”

Section: Methodsmentioning

confidence: 99%

“…Prestyloid tumors often posteriorly displace the ICA, whereas retrostyloid tumors often anteromedially displace the ICA. 8,16,17 Preoperative FNAC was applied only when tumors were detected by performing ultrasound of the neck or by palpation of the neck or oral cavity. If FNAC could not determine whether the tumor was benign or malignant initially, then FNAC was performed multiple times.…”

Section: Methodsmentioning

confidence: 99%

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Classification of tumors by imaging diagnosis and preoperative fine‐needle aspiration cytology in 120 patients with tumors in the parapharyngeal space

et al. 2019

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Background Tumors in the parapharyngeal space are rare, and preoperative diagnosis is difficult because of anatomical and histological complexity. Methods To evaluate the usefulness of preoperative diagnosis, we compared the classification of tumor localization in the prestyloid and retrostyloid compartments by imaging and preoperative cytological diagnosis by fine‐needle aspiration cytology with the postoperative histopathological diagnosis in 120 patients with tumors in the parapharyngeal space. Results Tumors were located in the prestyloid and retrostyloid compartments in 68 and 52 patients, respectively. The majority of histopathological diagnoses in the prestyloid and retrostyloid compartments were pleomorphic adenoma and schwannoma, respectively. All malignant tumors were in the prestyloid compartment. The preoperative cytological diagnostic rate for benign or malignant tumor was 95.2%, which was not inferior to that for other head and neck lesions. Conclusion Our results suggested that the preoperative classification of tumor localization and cytological diagnosis improved the accuracy of presumptive diagnosis.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Classification of tumors by imaging diagnosis and preoperative fine‐needle aspiration cytology in 120 patients with tumors in the parapharyngeal space

et al. 2019

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“…Schwannomas of the carotid space share imaging features with schwannomas in other locations, and it should be noted that they tend to displace the ICA anteromedially at the nasopharynx and splay the ICA and internal jugular vein in opposite directions (Figs 2, 17) (16,17). Conversely, a sympathetic chain schwannoma, which arises adjacent to the carotid sheath, tends to displace both the ICA and internal jugular vein in the same direction (16,17). Paragangliomas (glomus jugulare, glomus vagale, and carotid body tumor) can be distinguished from schwannomas on the basis of their serpiginous hypervascularity, which is not typically found in schwannomas (39).…”

Section: Carotid Spacementioning

confidence: 99%

“…Both MR and CT images show evidence of the slow growth of schwannomas, including smooth expansion of the neural foramina, osseous remodeling, and/or deformation of adjacent brain tissue, with a disproportionately small amount of edema, given the size of the lesion (Fig 1) (12,14,15). In the neck, these lesions also displace adjacent structures without invasion-as in the case of a CN X schwannoma splaying the ICA and internal jugular vein in the carotid space (Fig 2), without narrowing or occluding the vessel (16,17).…”

Section: Introductionmentioning

confidence: 99%

Cranial Nerve Schwannomas: Diagnostic Imaging Approach

Skolnik¹,

Loevner²,

Sampathu³

et al. 2016

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Schwannomas are benign nerve sheath tumors that may arise along the complex course of the cranial nerves (CNs), anywhere in the head and neck. Sound knowledge of the CN anatomy and imaging features of schwannomas is paramount for making the correct diagnosis. In this article, we review approaches to diagnosing CN schwannomas by describing their imaging characteristics and the associated clinical presentations. Relevant anatomic considerations are highlighted by using illustrative examples and key differential diagnoses categorized according to regions, which include the anterior skull base, orbit, cavernous sinus, basal cisterns, and neck. The clinical presentations associated with CN schwannomas vary and range from no symptoms to symptoms caused by mass effect or CN deficits. Individuals with the inherited disorder neurofibromatosis type 2 are predisposed to multiple schwannomas. When a lesion follows the course of a CN, the radiologist's roles are to confirm the imaging features of schwannoma and exclude appropriate differential considerations. The characteristic imaging features of CN schwannomas reflect their slow growth as benign neoplasms and include circumscribed margins, displacement of local structures, and smooth expansion of osseous foramina. These neoplasms exhibit various degrees of solid enhancement, often with internal cystic spaces on magnetic resonance (MR) and computed tomographic (CT) images and heterogeneous high signal intensity specifically on T2-weighted MR images. Clinical and/or imaging evidence of end-organ compromise of the involved CN may exist and aid in the identification of the nerve of origin. With a detailed understanding of the course of the CNs, the diagnostic features of CN schwannomas, and the correlation between these data and the associated clinical presentations of these tumors, the radiologist can have a key role in the diagnosis of CN schwannomas and the treatment planning for affected patients. (©)RSNA, 2016.

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“…Various surgical approaches for intracranial and extracranial hypoglossal schwannoma have been previously described [1][2][3][4][5][6][7] , such as the posterolateral approach, extradural transjugular approach, and transcervical approach. Many studies have focused on the development of minimally invasive surgical approaches and on success in achieving functional recovery by reconstruction of the hypoglossal nerve [1,2] .…”

Section: Introductionmentioning

confidence: 99%

Endoscopic Transoral Approach for Extracranial Hypoglossal Schwannoma

Zhang

Wang

et al. 2011

ORL

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Objective: Hypoglossal nerve schwannoma, especially when inside the extracranial region, is extremely rare. This report describes a new endoscopic transoral approach for the removal of extracranial hypoglossal schwannoma. Patients and Methods: Three patients (1 male and 2 females, aged 58–63 years) with extracranial hypoglossal schwannoma in the paroccipital condyle and the jugular foramen were treated solely by an endoscopic transoral approach. All patients presented signs of hypoglossal nerve paresis with hemiatrophy of the tongue. In addition, one of them had glossopharyngeal nerve paresis, and vagus nerve paresis was found in another patient. Results: In all patients, tumors underwent successful radical intracapsular removal by the endoscopic transoral approach, as confirmed by the postoperative examinations and MRI. No complications occurred during or after surgery, except that 1 patient had swallowing difficulties and a temporary right vagus palsy during the first day after surgery. All patients were followed up for 6 months, and the lack of any recurrence has been confirmed. Muscle bulk, motor and swallowing functions, and the vagus palsy improved in all patients. Conclusion: The endoscopic transoral approach is a safe and useful surgical technique for the removal of intracapsular tumors, including extracranial hypoglossal schwannomas, which involves minimal invasion.

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Glossopharyngeal schwannoma of the suprahyoid carotid space: Case report and discussion of the relationship to the carotid artery

Cited by 11 publications

References 16 publications

Classification of tumors by imaging diagnosis and preoperative fine‐needle aspiration cytology in 120 patients with tumors in the parapharyngeal space

Classification of tumors by imaging diagnosis and preoperative fine‐needle aspiration cytology in 120 patients with tumors in the parapharyngeal space

Cranial Nerve Schwannomas: Diagnostic Imaging Approach

Endoscopic Transoral Approach for Extracranial Hypoglossal Schwannoma

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