A Case of Microcystic Meningioma with a Difficult Preoperative Diagnosis

Sawada, Kana; Tamaki, Masashi; Hashimoto, Hideko; Karakama, Jun; Sato, Yuki; Hara, Mutsuya; Tone, Osamu

doi:10.7887/jcns.25.62

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…Subdural hematoma caused by meningioma in the posterior fossa is extremely rare, with only 4 cases reported ( Table 1 ). Microcystic meningioma is a rare subtype of meningioma, accounting for only 1.6% of all cases [6] , [7] , [8] . Although the contrast patterns may vary with subtypes, meningiomas are usually demonstrated as homogeneously enhancing masses in postcontrast MR imaging, and show remarkable tumor blush in angiography because of their hypervascularity [ 9 , 10 ].…”

Section: Discussionmentioning

confidence: 99%

“…Although the contrast patterns may vary with subtypes, meningiomas are usually demonstrated as homogeneously enhancing masses in postcontrast MR imaging, and show remarkable tumor blush in angiography because of their hypervascularity [ 9 , 10 ]. The contrast pattern of microcystic meningioma is sometimes described as “faint reticular pattern,” which represents a spider's web-like enhancement inside the mass [ 7 , 8 ]. Histopathologically, microcystic meningioma consists of sheets of spindle tumor cells with a loose background and cystic structure with stellate cells [ 7 , 11 ].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A case of microcystic meningioma associated with acute subdural hematoma in the posterior cranial fossa

Kuroda

Tokugawa

Yamataka

et al. 2022

Radiology Case Reports

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A case of microcystic meningioma associated with acute subdural hematoma in the posterior cranial fossa

Kuroda

Tokugawa

Yamataka

et al. 2022

Radiology Case Reports

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Characteristic features and proposed classification in 69 cases of intracranial microcystic meningiomas

Lin

Zhao

et al. 2018

Neurosurg Rev

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Microcystic meningioma (MM) is a rare subtype of intracranial meningiomas, with clinical and radiologic features not well characterized in the literature. Based on our experience, we propose a classification system of intracranial MMs. We reviewed the medical records, radiographic studies, and operative notes of a group of consecutive patients with intracranial MM. The mean age of the 69 patients was 46.8 ± 10.6 years (range, 21-75 years). Three types of intracranial MMs could be identified. Type 1 MMs presented as a solid lesion, hypointense or isointense on T1WI, hyperintense on T2WI, and homogeneous or heterogeneous enhancement, and were found in 43 patients (67.2%). Type 2 MMs represented signals similar to CSF both on T1WI and T2WI, and faint reticular enhancement with marginal enhancement, and these were found in 7 patients (10.9%). Type 3 MMs consisted of cystic-solid or cystic lesion and were found in 14 patients (21.9%). Significant differences were observed among the different types of MMs for the following variables: sex, presence of severe peritumoral brain edema (PTBE), and extent of tumor resection. Females were found in all of patients with type 2 MMs, but were only 35.7% of those with type 3 MMs (P = 0.018). Severe PTBEs were more common among patients with type 1 MMs (55.8%) than among those with type 2 (14.3%) and type 3 MMs (14.3%) (P = 0.007). Type 1 MMs (97.7%) were associated with a significantly higher rate of gross total resection compared with the other two types (71.4 and 78.6%) (P = 0.019). Total length of hospital stay after craniotomy ranged from 4 to 30 days (median, 8 days). There were no significant differences in progression-free survival among the three types of MMs (P = 0.788). The current classification identifies three distinct types of intracranial MM based on their radiological findings and growth patterns. The type 1 MMs are more commonly associated with severe PTBE. Type 2 and Type 3 MMs have a higher predilection towards parasaggital location with venous involvement and therefore have a lower rate of gross total resection.

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A Case of Microcystic Meningioma with a Difficult Preoperative Diagnosis

Cited by 2 publications

References 16 publications

A case of microcystic meningioma associated with acute subdural hematoma in the posterior cranial fossa

A case of microcystic meningioma associated with acute subdural hematoma in the posterior cranial fossa

Characteristic features and proposed classification in 69 cases of intracranial microcystic meningiomas

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