A case is presented of metastatic dural carcinomatosis associated with a thickened subdural membrane similar to those found in association with posttraumatic chronic subdural hematomas. In this case burr-hole drainage was attempted as a result of findings on computed tomography scanning that suggested a right frontal chronic subdural hematoma. However, no chronic subdural hematoma or effusion was found. The pathology, radiographic findings, and clinical features of this phenomenon are discussed.
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