Sutural diastasis

Sutural diastasis is an abnormal widening of the skull sutures. It may be physiological in a neonate during a growth spurt. 

In non-traumatic scenarios accelerated growth of the sutural connective tissue without concurrent ossification is the underlying pathology. 

Aetiology
  • widening of the sutures may be appreciated on plain radiograph and is better still appreciated on CT
  • the following widths are considered to be diagnostic of sutural diastasis:
    • > 10 mm at brith
    • > 3mm at 2 years
    • > 2mm at 3 years
  • in case of trauma, it may be associated with or without fractures
  • in case of mass lesions or elevated intracranial pressure, secondary evidence of the same would be demonstrated
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Article information

rID: 30438
System: Head & Neck
Section: Pathology
Tags: suture, cases
Synonyms or Alternate Spellings:
  • Diastatic fracture

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