Adult cerebellopontine angle ependymoma presenting as an isolated cisternal mass: A case report

Ebrahimi, Hannan; Jelodar, Sina; Yarandi, Kourosh Karimi; Javadi, Arezoo Eftekhar; Alimohamadi, Maysam

doi:10.1016/j.jmir.2020.08.007

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…[8] Ebrahimi et al highlighted the importance of considering ependymomas as a differential diagnosis among CPA tumors as six adult cases of CPA ependymomas had been reported in the English literature by 2020. [5] Rare cases of CPA ependymomas extending into unusual locations such as into the cavernous sinus and pineal region have been reported. [4,16] In one case, Torun et al reported the tumor extending from the CPA into Meckel's cave.…”

Section: Discussionmentioning

confidence: 99%

Case report: Primary ependymoma of the trigeminal nerve presenting as trigeminal neuralgia

Shah

Islam

Suleman

et al. 2022

Surgical Neurology International

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Background: Ependymomas are usually found in the posterior fossa originating from the fourth ventricle. Primary ependymomas arising from cranial nerves are rare with only a handful of reported cases. Trigeminal neuralgia (TN) is rarely due to space occupying lesions. Case Description: A 20-year-old female presented with TN with a rare presentation of a pure extra-axial ependymoma involving the right trigeminal nerve in the cerebellopontine angle. Conclusion: It is essential to explore the possibility of a mass arising from the trigeminal nerve when investigating the cause of TN.

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Section: Discussionmentioning

confidence: 99%

Case report: Primary ependymoma of the trigeminal nerve presenting as trigeminal neuralgia

Shah

Islam

Suleman

et al. 2022

Surgical Neurology International

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“…They can arise from its floor, roof, and/or the lateral aspect. However, the CP angle is an extremely rare site for the occurrence of ependymoma which has been infrequently described in limited reports by Salunke P et al 7 , Lan Z et al 8 , Ebrahimi H et al 9 , Dibs K et al 10 and when present, poses significant diagnostic and management challenges. It can easily masquerade as a vestibular schwannoma on imaging, which is typically known to occur at CP angle.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Posterior Fossa Ependymoma in a Child with Extensive Chondro-Osseous Metaplasia Occurring at Cerebellopontine Angle and Masquerading as a Vestibular Schwannoma: An Exceptionally Rare Clinicopathological Manifestation with Review of Literature

Malik,

Samanta,

Kolte

2024

J Neurol Surg Rep

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Ependymoma occurring at the cerebellopontine (CP) angle is an extremely uncommon sight and poses diagnostic and management dilemmas to neurosurgeons, radiologists, and neuropathologists alike. Moreover, the presence of extensive chondro-osseous metaplastic elements in ependymomas is an exceptionally infrequent histopathological manifestation. However, due to the seldom-seen nature of this histomorphological feature, there is no definite consensus regarding its etiopathogenesis and clinical consequences, and there is an extreme scarcity of literature elucidating its clinicopathological spectrum and prognostic significance. Herein, we illustrate an intriguing clinical tale of a 7-year-old male child with posterior fossa ependymoma, CNS WHO grade 3, arising at the right CP angle and masquerading as a vestibular schwannoma, which in itself is a rare presentation, and additionally, exhibiting extensive chondro-osseous metaplasia, which is a very uncommon histomorphological observation. To the best of the authors’ knowledge and after a comprehensive literature search, the coexistence of these two rare observations has merely been described once in international literature. This case sheds light on and highlights the importance of keeping ependymoma as a possible differential while coming across CP angle space-occupying lesions. They should be diligently distinguished from schwannomas and other masqueraders that typically occur at this site, as they have diverse management and follow-up protocols, with varying prognostic outcomes for the patients. Moreover, this case also unravels and details the clinicopathological characteristics of a scarcely described feature of chondro-osseous metaplasia in ependymomas.

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“… 13 This location is very rare in adults and creates a diagnosing challenge. 14 Ependymomas are generally seen as lobulated solid tumors, which are hypointense on T1-w image, hyperintense on T2-w image, and demonstrate intense irregular enhancement on MRI. They may show heterogeneity due to necrosis, cystic components, calcification, or hemorrhage.…”

Section: Primary Anaplastic Ependymoma Of the Cerebellopontine Anglementioning

confidence: 99%

Magnetic Resonance Imaging of Unusual Neoplasms Related to Foramen of Luschka: A Review for Differential Diagnosis

Demir

Özdamarlar

Yılmaz

et al. 2022

Indian J Radiol Imaging

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There are many types of neoplasms in or around the foramen of Luschka (FL), and definitive diagnosis in some cases requires knowledge of imaging findings. The uncommon and challenging neoplasms with FL involvement considered in this study are exophytic brainstem glioma, primary glioblastoma of the cerebellopontine angle (CPA), primary anaplastic ependymoma of the CPA, choroid plexus papilloma of the FL, solitary FL choroid plexus metastasis, extraskeletal myxoid chondrosarcoma of the jugular foramen, paraganglioma of the jugular foramen, exostosis of the jugular foramen, psammomatous meningioma in the lateral cerebellar medullary cistern, epidermoid tumor of the fourth ventricle, and a hypoglossal schwannoma. These neoplasms may have overlapping clinical and imaging features, but some have relatively distinct imaging features. Knowledge of the key clinical and magnetic resonance imaging features of these unusual lesions with FL involvement is important for radiologists to improve diagnostic ability and to assist the referring physician in the appropriate management of the patient.

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Adult cerebellopontine angle ependymoma presenting as an isolated cisternal mass: A case report

Cited by 5 publications

References 25 publications

Case report: Primary ependymoma of the trigeminal nerve presenting as trigeminal neuralgia

Case report: Primary ependymoma of the trigeminal nerve presenting as trigeminal neuralgia

Posterior Fossa Ependymoma in a Child with Extensive Chondro-Osseous Metaplasia Occurring at Cerebellopontine Angle and Masquerading as a Vestibular Schwannoma: An Exceptionally Rare Clinicopathological Manifestation with Review of Literature

Magnetic Resonance Imaging of Unusual Neoplasms Related to Foramen of Luschka: A Review for Differential Diagnosis

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