Growing skull fracture

Case contributed by Dr Dalia Ibrahim


Trauma 1 month ago. Recent right parietal progressive scalp swelling.

Patient Data

Age: 1 year
Gender: Male
Modality: CT
  • Right parietal calvarial widened linear fracture.
  • Right parietal area of encephalomalacia underlying the fracture.
  • Right parietal subgaleal small cyst of CSF density was seen protruding through the fracture gap.
Modality: Annotated image

Growing skull fracture

Case Discussion

Leptomeningeal cysts, also known as growing skull fractures, are an enlarging skull fracture that occurs near post-traumatic encephalomalacia.

The exact pathogenesis remains unclear, but it is thought they occur secondary to skull fractures causing dural tears, allowing the leptomeninges and/or cerebral parenchyma to herniate into it. Pulsations from CSF erode the fracture margin, resulting in eventual expansion and non-union.

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Case Information

rID: 53470
Case created: 19th May 2017
Last edited: 21st May 2017
Inclusion in quiz mode: Included

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