Ossified Metaplastic Spinal Meningioma Without Psammomatous                    Calcification: A Case Report

Murakami, Taiki; Tanishima, Shinji; Takeda, Chikako; Kato, Shinsuke; Nagashima, Hideki

doi:10.33160/yam.2019.06.008

Cited by 13 publications

(6 citation statements)

References 11 publications

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“…Ossification differs from these is seen in Psammomatous Meningioma. 13 We diagnosed the Meningioma as Grade 1 based on, its microscopic study and its site, in the microscopic study Meningothelial cells and whorl patterned psammoma bodies were observed. Hence, it is a Psammomatous type of Grade 1 Meningioma.…”

Section: Discussionmentioning

confidence: 99%

Grade I Meningioma in a cadaver – A case report

Londhe,

Gosavi,

Kasegaonkar

et al. 2024

IJCAP

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In a routine dissection of anatomy department in Ashwini Rural Medical College and Research Centre Kumbhari, Solapur, Maharashtra. While removing the brain from the cadaveric skull.Noticed a small tumor of measuring 1.3cm in length, 1.3cm in breadth and 1.2cm in height, situated at the orbital surface of the brain in the gyrus rectus of a male cadaver.In the histological study it was diagnosed as a Meningioma grade I.It was small size encapsulated tumor on inferior aspect of brain. On histological study, it showed meningo epithelial cells in whorl pattern, blood vessels, fibrous tissue Psammoma bodies, which indicate grade I meningioma.

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Section: Discussionmentioning

confidence: 99%

Grade I Meningioma in a cadaver – A case report

Londhe,

Gosavi,

Kasegaonkar

et al. 2024

IJCAP

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“…However, some reports ( 4 , 8 , 10 , 15 , 21 ) have occasionally found that ossification can occur without psammoma bodies, which may not support the hypothesis. Hence, most studies prefer to believe that ossification is secondary to the metaplasia of arachnoid cells and interstitial cells, which induce the synergistic effect of osteoblast, fibroblast, and angiogenesis components in bone tissue formation ( 4 , 8 , 10 , 23 ). Up to now, seven studies have mentioned the formation of hematopoietic tissue in OSM.…”

Section: Discussionmentioning

confidence: 99%

Multiple ossified spinal meningiomas in the thoracic spine: A case report and literature review

et al. 2022

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BackgroundOssified spinal meningioma (OSM) is a rare form of a spinal tumor. The surgical strategies and pathologic findings related to OSM have been investigated in recent years. However, multiple OSMs are rarely reported. Here, we intend to present a rare case of multiple OSMs and review the relevant published literature.Case PresentationA 76-year-old woman experienced a progressive sensorimotor disturbance in her bilateral lower limbs for the past 2 years. She complained of inability to walk, urinary incontinence, and chronic constipation when referred to our hospital. A neurological examination revealed a diminished sensation below the bilateral T7, and her neurological status was Nurick Grade 6. Magnetic resonance imaging (MRI) revealed multiple intradural-extramedullary neoplasms at the T7–T11 level. Computed tomography (CT) scans showed five high-density masses of varying sizes in the spinal canal at the T7–T12 level. The patient underwent tumor resection through T7–T11 laminectomy. A histopathological examination revealed multiple OSMs.ConclusionWe reported a rare case of multiple OSMs in an elderly patient. After one-stage complete resection, the patient recovered with satisfactory curative effect. Although elderly patients will face various postoperative complications due to their poor physical condition, we still recommend one-stage complete resection of multiple OSMs to reduce recurrence.

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“…Myxoid metaplastic meningioma are characterized by their excessive hyaluronic acid and chondroitin sulfate [ 5 , 7 , 9 , 12 ]. Osseous subtypes are confirmed by the presence of mature bone tissue and tumor cells in regions containing no psammoma bodies [ 1 , 14 , 15 , 17 , 18 ]. A recent literature review by Choi et al [ 2 ] described 26 metaplastic meningiomas, including 12 osseous subtypes, nine lipomatous subtypes, four xanthomatous subtypes, and one cartilaginous subtype.…”

Section: Discussionmentioning

confidence: 99%

Intracranial Metaplastic Meningioma : Clinical and Radiological Characteristics of 11 Cases

Kim¹,

Kim²,

Ji³

et al. 2020

J Korean Neurosurg Soc

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Objective Metaplastic meningioma is an extremely rare subtype of World Health Organization (WHO) grade I meningioma. It has distinctive histological subtypes according to its own mesenchymal components. Owing to its scarcity, clinical or radiological features of a metaplastic meningioma are poorly described. Methods Between 2004 and 2018, we analyzed total 1814 cases surgically proven meningioma for 15 years. Among them, metaplastic meningioma was diagnosed in 11 cases. Magnetic resonance images were taken for all patients, and computed tomography scan was taken for 10 patients. Results WHO grade I meningiomas were 1376 cases (75.9%), 354 cases (19.5%) in WHO grade II, and 84 cases (4.6%) in WHO grade III meningiomas. Metaplastic meningioma was 11 cases as 0.8% of WHO grade I meningioma and 0.6% of entire meningiomas for 15 years. Among the entire 11 metaplastic meningiomas, five tumors (45%) were diagnosed as a lipomatous subtype with rich fat components, four (36%) as an osseous subtype with extensive bone formation and two (18%) as a xanthomatous subtype. There was no cartilaginous subtype metaplastic meningioma in our study. Lipomatous and osseous metaplastic meningioma have peculiar radiological characteristics according to mesenchymal components. Conclusion We investigated a rare metaplastic meningioma subtype based on our 15-year surgical experience with meningiomas. Further investigation will be necessary for the clear clarification of tumor nature of this rare tumor.

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Ossified Metaplastic Spinal Meningioma Without Psammomatous Calcification: A Case Report

Cited by 13 publications

References 11 publications

Grade I Meningioma in a cadaver – A case report

Grade I Meningioma in a cadaver – A case report

Multiple ossified spinal meningiomas in the thoracic spine: A case report and literature review

Intracranial Metaplastic Meningioma : Clinical and Radiological Characteristics of 11 Cases

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