MRI manifestations and pathological basis of atypical meningioma

CHEN Jijun; LIU Jian; FAN Feifei; MO Fei; ZHAO Xinchun; ZHAO Peng; HAO Yuewen

doi:10.7619/jcmp.201917019

Journal of Clinical Medicine in Practice > 2019 > 23(17): 69-71. > DOI: 10.7619/jcmp.201917019

CHEN Jijun, LIU Jian, FAN Feifei, MO Fei, ZHAO Xinchun, ZHAO Peng, HAO Yuewen. MRI manifestations and pathological basis of atypical meningioma[J]. Journal of Clinical Medicine in Practice, 2019, 23(17): 69-71. DOI: 10.7619/jcmp.201917019

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MRI manifestations and pathological basis of atypical meningioma

1.
Department of Emergency, Xijing Hospital of Air force Medical University, Xi′an, Shaanxi, 710032
2.
Department of Neurosurgery, Xijing Hospital of Air force Medical University, Xi′an, Shaanxi, 710032
3.
Department of Radiology, Xijing Hospital of Air force Medical University, Xi′an, Shaanxi, 710032

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Received Date: June 15, 2019
Accepted Date: August 25, 2019
Available Online: February 28, 2021
Published Date: September 14, 2019

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Abstract

Abstract

Objective To investigate the magnetic resonance imaging (MRI) characteristics and pathological basis of atypical meningiomas.
Methods The MRI materials of 20 patients with atypical meningioma confirmed by surgery and pathology were retrospectively analyzed, including imaging features (cystic degeneration, lobulation, enhancement mode and degree, tumor-brain interface, adjacent skull signs) and pathological basis.
Results The tumors were located on convex surface in 12 cases, beside falciform surface in 6 cases, and beside sigmoid sinus in 2 cases. Typical MRI findings showed clear boundary soft tissue masses. The lesion showed iso-signal or hypo-signal on T₁WI, and hyper-signal on T₂WI. The space-occupying effect was more significant than edema. Cystic degeneration and necrosis were found in the tumors. Enhanced scan showed heterogeneous enhancement.
Conclusion The incidence rate of atypical meningioma is low, and its MRI manifestations has certain characteristics. Preoperative localization and qualitative diagnosis of tumors can be achieved by plain and enhanced MRI scans.
- meningiomas,
- magnetic resonance imaging,
- pathology,
- space occupying effect,
- necrosis

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