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Journal of Korean Neurosurgical Society > Volume 25(7); 1996 > Article
Journal of Korean Neurosurgical Society 1996;25(7): 1509-1515.
Malignant Intracranial Osteolytic Meningioma Appearing as an Extracranial Soft Tissue Mass: A Cases Report.
Jin Soo Yang, Joo Seob Keum, Seung Min Lee, Jae Young Yang, Chun Sik Choi, Mun Bae Ju
1Department of Neusorugery, Kangbuk Samsung Hospital, Seoul, Korea.
2Department of Pathology, Kangbuk Samsung Hospital, Seoul, Korea.
Malignant intracranial meningioma is a rare pathologic entity. Although the topic is widely discussed, there is little agreement in the literatures as to the histological and radiological features that warrant the diagnosis of malignant meningioma. An osteolytic lesion of the skull may have been suggested in several cases. But in adults, the most commonly suspected lesion is metastatic lesion;while meningioma is rarely suspected. Meningiomas are occasionally associated even with extracranial masses. However, most of these masses are firm, and are caused by hyperostosis. Extracranial soft-tissue masses rarely arise in meningiomas, thus, the presence of both osteolytic skull lesion and soft-tissue mass is exceedingly rare in meningiomas. The authors report a case of osteolytic malignant meningioma located at the frontal fossa extending to the subgaleal space appearing as an extracranial soft-tissue mass in a 19-year-old female. The clinical, radiological, neurosurgical, and histopathological features of these lesions are discussed together with a review of the literatures.
Key Words: Malignant meningioma; Osteolysis; Soft-tissue mass
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