Atypical Computed Tomography Feature and Unusual Location of Intracranial Meningiomas in Maharat Nakhon Ratchasima Hospital
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Abstract
Objective: The purpose of the study was to review atypical computed tomography (CT) features and unusual locations of intracranial meningiomas that could lead to misdiagnosis in Maharat Nakhon Ratchasima Hospital. Patients & Methods: This was a retrospective descriptive study of the meningioma patients who were pathologically proven in Maharat Nakhon Ratchasima Hospital during January 1, 2006 to December 31, 2008. CT of brain with contrast study of all patients was reviewed. The CT scan findings were evaluated for the unusual locations and atypical features of the tumor. Results: We had 24 patients with atypical CT scan features and unusual locations of meningiomas, 5 males and 19 females. The ages ranged from 31-79 years and the average patient age was 50.0+12.0 years. CT scan with atypical features of tumors were found in 20 cases. Central necrosis 20%, hemorrhagic meningioma 20%, cystic meningioma 20%, ring enhancement 15%, en plaque meningioma 10%, multiple meningiomas 10% and bone invasion 5.0% were recorded. Unusual locations were observed in 8 of 24 patients, i.e. lateral ventricle 50%, cerebellopontine angle 37.5% and orbital region 12.5%. Four of 8 patients had both atypical CT features and unusual locations. Conclusion: Atypical CT features and unusual locations of intracranial meningiomas in Maharat Nakhon Ratchasima Hospital were found 24%. The majority of them were female, mean age 50+12 years. Atypical CT features were tumor with central necrosis, hemorrhagic tumor and cystic tumor with ring enhancement about 20%, 20%, 20% and 15 %, respectively. Unusual locations were ventricles and cerebellopontine angle, about 50% and 37.5%, respectively.
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