Diagnosis of a Rare Intraventricular Schwannoma

Chiba, Ryohei; Akiyama, Yukinori; Kimura, Yusuke; Yokoyama, Rintaro; Mikuni, Nobuhiro

doi:10.1016/j.wneu.2019.09.137

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Of the 23 cases ( Table 1 ) ( 4 – 8 , 11 – 27 ), LVES was more common in men (74%, 17/23) than in women and was mostly located on the right side (78%, 18/23). The average age at clinical presentation is 28 years, with an age range between 8 and 68 years ( Figure 4 ).…”

Section: Discussionmentioning

confidence: 99%

“…S-100 and vimentin are typically positively expressed, while GFAP and EMA are often negatively expressed ( 7 , 25 ). Through a literature review, we found that some cases appeared as misdiagnoses based on the preoperative and intraoperative frozen section, and the misdiagnoses included ependymoma, cystic astrocytoma, cystic meningioma, hemangioblastoma, fibroblastic meningioma, papilloma and choroid plexus carcinoma ( 8 , 14 , 16 , 18 , 21 , 27 ). In addition, the majority of the 23 cases were diagnosed as LVES based on the pathological findings.…”

Section: Discussionmentioning

confidence: 99%

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Lateral ventricle ectopic schwannoma: Case report and literature review

Xiang

Zhou

et al. 2023

Front. Oncol.

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BackgroundCases of lateral ventricular ectopic schwannomas (LVES) are extremely rare, with only 23 cases reported thus far. This study aimed to obtain a better understanding of the disease.MethodsWe reported a rare case of LVES, in which the patient was admitted to our hospital, and reviewed the relevant literature on LVES to summarize and analyze the clinical manifestations, pathologies, imaging features and progress.ResultsOf the 23 patients, LVES was more common in men (74%, 17/23) than in women and was mostly located on the right side (78%, 18/23). The average age at clinical presentation was 28 years, with an age range between 8 and 68 years. Moreover, most cases were histologically benign, except in one case of malignancy. In all the benign cases, there were 2 cases of subtotal resection, but no recurrence was found during follow-up.ConclusionsThe origin of LVES could be the tumor transformation of autonomic nerve tissue in the perivascular choroid plexus. For lateral ventricle tumors,which are rare benign lesions with good prognosis after surgical resection, LVES should be considered in the differential diagnosis. Moreover, whether LVES could be considered for gamma knife treatment, similar to a small acoustic neuromas,requires further investigation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Lateral ventricle ectopic schwannoma: Case report and literature review

Xiang

Zhou

et al. 2023

Front. Oncol.

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“…Intraventricular schwannomas are exceedingly rare intracranial tumours [ 4 ]. When encountered, they are predominantly located within the lateral ventricles, followed by the fourth ventricle [ 5 , 6 ].…”

Section: Discussionmentioning

confidence: 99%

“…The affected age group varies significantly for intracerebral schwannomas. Additionally, with the paucity of reported cases of intraventricular schwannomas in the literature, there is still more to be understood [3,4].…”

Section: Introductionmentioning

confidence: 99%

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An Unsuspected Intraventricular Schwannoma

Calderon¹,

Ramsingh²,

Ramnarine³

2021

Cureus

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Intraventricular schwannomas are rarely encountered in neurosurgical practice. The development and progression of a schwannoma within the ventricular system is still a hypothesised theory. Here, we present a case of a 59-year-old female who presented with a three-week history of headaches. Her symptoms progressively worsened, with resultant altered mental status within the last week. Imaging scans of the brain demonstrated a well-defined mass within the right lateral ventricle with associated midline shift and obstructive hydrocephalus. A parietal craniotomy and resection of the intraventricular mass was performed. Her postoperative course was uneventful. Histopathological assessment depicted a biphasic pattern of Antoni A and B, with a strongly positive S100. This was in keeping with an intraventricular schwannoma. The diagnosis of an intraventricular schwannoma does not fit within the classical differential framework for ventricular masses. These tumours are extremely uncommon but fortunately, they are typically benign. Therefore, adequate surgical resection remains the gold standard of care for these unfamiliar masses.

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