Asahi T, Endo S, Akai T, Takaba M, Takaku A
Department of Neurosurgery, Toyama Medical and Pharmaceutical University.
Neurol Med Chir (Tokyo). 1998 Jun;38(6):374-6. doi: 10.2176/nmc.38.374.
A 63-year-old male presented with an unusual case of nontraumatic intradiploic arachnoid cyst in the frontotemporal convexity area. Skull radiography showed a circular osteolytic lesion of the right parietal bone. Computed tomography revealed a defect of the inner table, widened diploic space, and thinned outer table. Magnetic resonance imaging showed a cyst containing cerebrospinal fluid. Bone scintigraphy showed no abnormal uptakes. Intraoperative observation confirmed the neuroimaging findings. Histological examination found no abnormal findings in specimens of skull bone or arachnoid membrane. Intradiploic arachnoid cyst is characterized by parasagittal, multiple, well-demarcated osteolytic lesions on radiographs in the elderly. However, the clinical features of this disease remain unclear and diagnosis without an exploratory surgical procedure may not be possible.
一名63岁男性出现了一例不寻常的额颞叶凸面区非创伤性板障内蛛网膜囊肿病例。颅骨X线摄影显示右顶骨有一个圆形骨质溶解病变。计算机断层扫描显示内板缺损、板障间隙增宽和外板变薄。磁共振成像显示一个含有脑脊液的囊肿。骨闪烁显像未显示异常摄取。术中观察证实了神经影像学检查结果。组织学检查在颅骨或蛛网膜标本中未发现异常。板障内蛛网膜囊肿在影像学上的特征是老年人矢状窦旁多发、界限清楚的骨质溶解病变。然而，这种疾病的临床特征仍不清楚，未经探索性手术可能无法诊断。
