Okamoto S, Hisaoka M, Aoki T, Kadoya C, Kobanawa S, Hashimoto H
Department of Pathology and Oncology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
Skeletal Radiol. 2000 Jun;29(6):354-7. doi: 10.1007/s002560000217.
Extradural ectopic meningioma is a rare tumor. We report on an example of microcystic meningioma arising in the skull of an elderly woman. Radiological examination revealed a localized osteolytic lesion in the left parietal bone. At surgery, it was discovered that the tumor was located within the skull without any evidence of extraosseous extension. The light microscopic, immunohistochemical and ultrastructural features were consistent with a microcystic variant of meningioma. To our knowledge, this is the first case of an intraosseous microcystic meningioma, and we believe that this type of meningioma should be considered in the differential diagnoses of myxoid bone tumors of the calvarium.
硬膜外异位脑膜瘤是一种罕见的肿瘤。我们报告一例发生在一位老年女性颅骨内的微囊性脑膜瘤。影像学检查显示左顶骨有一个局限性骨质溶解病变。手术中发现肿瘤位于颅骨内，没有任何骨外扩展的证据。光镜、免疫组化和超微结构特征与脑膜瘤的微囊性变体一致。据我们所知，这是首例骨内微囊性脑膜瘤，我们认为在鉴别诊断颅盖骨黏液样骨肿瘤时应考虑这种类型的脑膜瘤。
