Spontaneous chronic and subacute subdural haematoma in young adults.

Spontaneous subacute and chronic haematoma in young adults is rare. It has not been previously reported in this age group. We present three cases of chronic and subacute subdural haematoma in young adults, in one of whom the diagnosis was certainly delayed. All three patients underwent burrhole evacuation and made a full neurological recovery. A cause for the haematoma was never established. The literature on the subject, which is scanty, is reviewed and the condition is briefly discussed. The aetiology remains obscure.