Neuroradiology
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A case where an encapsulated permanent epidural catheter for continuous analgesia caused pressure on the dural sac is presented. The clinical findings and postmyelographic computerised tomography (CT) imitated an epidural metastasis, until an epidurography via the epidural catheter revealed its true nature.
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The cerebral fat embolism is a potentially serious complication of fractures but clinical cases often go undiagnosed. Two cases of clinically diagnosed cerebral fat embolism are reported, and MR images of these patients are described. ⋯ In one patient follow-up MR showed nearly complete resolution of the abnormal signal. MR imaging appears to be valuable for detecting the lesions in these patients.
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We report two cases with subarachnoid dissemination of medulloblastoma depicted clearly by Gadolinium-DTPA enhanced MRI. We also demonstrate the superiority of Gadolinium-DTPA enhanced MRI over nonenhanced MRI, CT, myelography and postmyelographic CT for diagnosing subarachnoid dissemination and for monitoring the response to therapy.