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Neuroradiological aspects of subdural haemorrhages
  1. S Datta1,
  2. N Stoodley2,
  3. S Jayawant3,
  4. S Renowden2,
  5. A Kemp1
  1. 1Dept of Neuroradiology and Child Health, University Hospital of Wales, Cardiff, UK
  2. 2Dept of Neuroradiology, Frenchay Hospital, Bristol, UK
  3. 3Dept of Paediatrics, John Radcliffe Hospital, Oxford, UK
  1. Correspondence to:
    Dr S Datta
    Specialist Registrar in Radiology, Department of Radiology, University Hospital of Wales, Heath Park, Cardiff CF14 4XW, UK;


Aims: To review the neuroimaging of a series of infants and young children admitted to hospital with subdural haemorrhage (SDH).

Methods: Neuroradiological investigations of 74 children under 2 years of age, from South Wales and southwest England, in whom an SDH or subdural effusion had been diagnosed between 1992 and 2001, were reviewed. Two paediatric neuroradiologists blinded to the original radiological report reviewed all the relevant images.

Results: Neuroradiological review of images identified radiological features which were highly suggestive of non-accidental head injury (NAHI). Interhemispheric haemorrhages and SDHs in multiple sites or of different densities were almost exclusively seen in NAHI. MRI was more sensitive in identifying SDHs of different signal characteristics, posterior and middle cranial fossa bleeds, and parenchymal changes in the brain. CT scans, if performed with suboptimal protocols, were likely to miss small subdural bleeds.

Conclusions: Guidelines for neuroimaging in suspected NAHI are recommended. A radiologist with experience in NAHI should report or review these scans. The initial investigation should be CT, but MRI will also be necessary in most cases. Head CT should be an integral part of the skeletal survey in all infants less than 6 months of age referred for child protection investigation, and in children less than 2 years where child abuse is suspected and there are neurological signs, retinal haemorrhages, or fractures.

  • CT, computed tomography
  • DAI, diffuse axonal injury
  • MRI, magnetic resonance imaging
  • NAHI, non-accidental head injury
  • SDH, subdural haemorrhage
  • subdural haemorrhage
  • infants
  • neuroradiology
  • NAHI
  • guidelines

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