From the case: Dagger (photo)

Modality: Photo

Used in the following article:

  • Dagger sign (spine) - “ The dagger sign is a radiographic feature seen in ankylosing spondylitis as a single central radiodense line on frontal radiographs related to oss...”
  • Coup de poignard of Michon - “ Coup de poignard of Michon refers to spinal subarachnoid hemorrhage, usually as a result of a spinal AVM. Presentation is with sudden excruciati...”

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