Supratentorial subarachnoid epithelial cyst: case report and ultrastructural study.
Supratentorial epithelial cysts are rare entities that have evoked controversy regarding their pathogenesis. Recent ultrastructural studies have failed to resolve this controversy. We present a case report and an ultrastructural study of such a cyst. The cyst wall was lined by columnar epithelial cells with prominent cilia and microvilli at their apical surface. They were joined by well-developed junctional complexes and contained abundant intracytoplasmic, electron-dense, granular material, some of which was membrane-bound. These ultrastructural findings suggest that epithelial cysts are derived from elements of the embryological tela choroidea.
D000328:Adult; D001706:Biopsy; D001927:Brain Diseases / Q000473:pathology* / Q000601:surgery; D003560:Cysts / Q000473:pathology* / Q000601:surgery; D004848:Epithelium / Q000473:pathology; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D013346:Subarachnoid Space; D014057:Tomography, X-Ray Computed