Localized cystic subdural hygroma: case report.
We report a new variant of subdural hygroma previously undocumented in the literature. A 29-year-old man had a skull mass and a progressive headache of 6 to 7 years duration. He was involved in a car crash 8 years earlier and had an unrecognized skull fracture. During surgery the lesion was found to be a localized, cystic subdural hygroma communicating with the subarachnoid space through a narrow opening. This lesion is unique because: (1) the subdural hygroma was limited by an adhesion between the dura and the arachnoid; (2) the actual communication between the subdural hygroma and the subarachnoid space was clearly identified; and (3) localized bulging of the skull is exceptional for a subdural hygroma. Differentiation from more common cystic lesions such as congenital arachnoid cysts, traumatic arachnoid cysts, intradiploic arachnoid cysts, and chronic subdural hematomas is discussed.
Department of Neurosurgery, University of Minnesota, Minneapolis.
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Rengachary
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DA
Duke
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Tsai
D000328:Adult; D016080:Arachnoid Cysts / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D018191:Lymphangioma, Cystic / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D013355:Subdural Space; D014057:Tomography, X-Ray Computed