A myelogram is performed upon a patient with a subacute, worsening paraparesis. The cerebrospinal fluid (CSF) and myelogram are both unremarkable except for a slight increase in the CSF protein content. A computed tomography (CT) scan of the spine is unrevealing. Plain films of the spine are completely normal. An MRI of the lumbar cord with gadolinium reveals patchy enhancement at about the L4–L5 spinal cord level. Based on this information, which of the following is the most likely diagnosis?

a. An intraspinal hemorrhage

b. An extraparenchymal meningioma

c. An intraparenchymal ependymoma

d. A transverse myelitis

e. A syringomyelia

the answer is below…

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