Occipital spur

Case contributed by Fateme Hosseinabadi


Car accident and headache.

Patient Data

Age: 25 years
Gender: Male

There is a focal spur-like bony protrusion in the posterior occipital protuberance extending in the craniocaudal direction.

Case Discussion

An occipital spur, also known as an occipital knob, occipital bun, chignon, or inion hook, is an exaggerated external occipital protuberance. Three types of external occipital protuberance have been described:

  • type I: smooth type
  • type II: crest type
  • type III: spine type

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