Abstract
Enterogenous cysts are infrequent developmental lesions of the central nervous system lined by endoderm-derived epithelium. The majority of these lesions occur in the spinal canal. Intracranial enterogenous cysts are uncommon with posterior fossa being the predominant site. Supratentorial enterogenous cysts are distinctly rare. We present a case of a 20-year-old female patient who presented with a 1 week history of headaches and left temporal hemianopia. MRI revealed a large extra-axial cystic lesion in the right parieto-occipital region measuring 45 mm in maximal dimension. Histological examination showed an enterogenous cyst lined by ciliated respiratory-type epithelium with an underlying basement membrane that stained with periodic acid-Schiff and type IV collagen. The epithelial cells were immunoreactive to cytokeratin and epithelial membrane antigen. Classification, differential diagnosis and histopathological findings of enterogenous cysts will be discussed.
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