Pediatric Accessory Skull Suture

  • Etiology: Congenital
  • Imaging:
    — Follows a zigzag pattern
    — Not diastatic
    — Merges with adjacent suture
    — Mo associated soft tissue swelling
  • DDX: Skull fracture has straight lucency which widens as it approaches suture, can cross adjacent suture, associated with soft tissue swelling
  • Complications: None
  • Treatment: None
  • Clinical:

Radiology Cases of Accessory Skull Suture

3D CT of accessory skull suture
3D reconstruction of a CT without contrast of the brain shows a lucency arising from the left lambdoid suture inferiorly and curving to the left that has a zig zag pattern and seems to interdigitate within the skull. Soft tissue windows showed no associated soft tissue swelling.
3D CT of intraparietal accessory skull suture
3D reconstruction of a CT without contrast of the brain shows a lucency arising from the left lambdoid suture anteriorly and curving anteriorly that has a zig zag course through the parietal bone.