What causes atraumatic subdural hematoma (SDH)?

Updated: Jul 26, 2018
  • Author: Richard J Meagher, MD; Chief Editor: Helmi L Lutsep, MD  more...
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Significant trauma is not the only cause of subdural hematoma. Chronic subdural hematoma can occur in the elderly after apparently insignificant head trauma. Often, the antecedent event is never recognized. Chronic subdural hematoma is a common treatable cause of dementia. A minority of chronic subdural hematoma cases derived from acute subdural hematomas that have matured (ie, liquefied) because of lack of treatment.

For the most part, this review discusses acute and chronic subdural hematomas; less information is available about the less common subacute subdural hematomas. [2] Atraumatic subdural hematoma and subdural hygroma are briefly addressed.

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