Froin’s Syndrome - On lumbar puncture, the cerebrospinal fluid (CSF) was xanthochromic, viscous, and coagulated in the tube (Panel A). The combination of elevated protein, xanthochromia, and hypercoagulation of CSF is pathognomonic for Froin’s syndrome, which can occur with blockage of CSF flow by a spinal cord mass or with meningeal irritation from meningitis. CT myelography showed a large intradural, extramedullary lesion at T11–T12 (Panel B, arrow), which was compressing the spinal cord. #Clinical #Radiology #CT #Myelography #Froin #Syndrome #FroinSyndrome #NEJM
