Mature cystic teratoma of the right cerebellopontine angle: a rare case report

Sattar, Reshma; Ratha, Vishwaraj; Kandallu, Suresh Bapu R; Kapilavayi, Sunil; Sampath, Nishanth; Sankaran, Vijay G.; Balasundaram, Partheeban

doi:10.1080/02688697.2021.1967287

Cited by 2 publications

(1 citation statement)

References 17 publications

(16 reference statements)

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“…For cystic tumors in the CPA, differential diagnoses include schwannoma, endodermal sinus tumor (neurenteric cyst), hemangioblastoma, cavernous malformation, meningioma, teratoma, epidermoid cyst, cysticercus, and ependymal cyst. [14][15][16][17][18][19][20][21][22][23][24] In the present case, MRI revealed a cystic tumor without any enhancement by the gadoliniumcontrast agent. Epidermoid cysts, endodermal sinus tumors, and ependymal cysts are typically nonenhanced lesions found on the CPA.…”

Section: Secondary Hfs and Differential Diagnosis Of The Cystic Lesionsupporting

confidence: 47%

Arachnoid cyst alone causes hemifacial spasm: illustrative case

Ozaki

Higuchi

Nakano

et al. 2022

Journal of Neurosurgery: Case Lessons

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BACKGROUND Hemifacial spasm (HFS) due to an arachnoid cyst at the cerebellopontine angle is rare. Here, the authors reported such a case and analyzed the mechanism of facial nerve hyperactivity by reviewing the literature. OBSERVATIONS A 40-year-old man presented with right HFS for the past 3 years. Preoperative magnetic resonance imaging revealed a right cerebellopontine angle cystic mass with high intensity on T2-weighted images, low intensity on T1-weighted and diffusion-weighted images, and no contrast effects. Cyst excision and decompression of the facial nerve using a lateral suboccipital approach to monitor abnormal muscle response (AMR) resulted in permanent relief. The cyst was histologically compatible with an arachnoid cyst. LESSONS In the present case, when the cyst was dissected, the AMR disappeared and no offending arteries were detected around the root exit zone. Therefore, the cyst itself was responsible for HFS, for which AMR was useful. Limited cases of HFS due to arachnoid cysts without neurovascular compression have been previously reported. The authors suggested that pulsatile compression by the cyst results in facial nerve hyperactivity and secondary HFS.

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Section: Secondary Hfs and Differential Diagnosis Of The Cystic Lesionsupporting

confidence: 47%

Arachnoid cyst alone causes hemifacial spasm: illustrative case

Ozaki

Higuchi

Nakano

et al. 2022

Journal of Neurosurgery: Case Lessons

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Mature teratoma of the cisterna magna in an adult patient

Jafri¹,

Hussain²,

Bari³

2022

Surgical Neurology International

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Background: Teratomas are a rare subgroup of CNS germ cell tumors and are histologically classified into mature teratomas, immature teratomas, and teratomas with malignant transformation. CNS teratomas are infrequently found in the posterior fossa and pure mature teratomas of posterior fossa are rare especially in adults. We present a case of a young adult female with a mature teratoma in the cisterna magna. Case Description: A 26-year-old female presented to the neurosurgery clinic with headache, nausea and vomiting for the past 1 year. She was found to have dysdiadochokinesia on neurological examination. Brain magnetic resonance imaging scan showed a-well defined lesion, hyperintense on T1 and hypointense on T2-weighted sequences located within the cisterna magna. She underwent a suboccipital craniotomy with resection of lesion. Histopathology confirmed the diagnosis of mature cystic teratoma. Conclusion: Mature teratomas located in the posterior fossa among adults are rare in the literature. We report the second case of mature teratoma in the cisterna magna of an adult patient.

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Mature cystic teratoma of the right cerebellopontine angle: a rare case report

Cited by 2 publications

References 17 publications

Arachnoid cyst alone causes hemifacial spasm: illustrative case

Arachnoid cyst alone causes hemifacial spasm: illustrative case

Mature teratoma of the cisterna magna in an adult patient

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