title: Chronic subdural haematoma evolving from traumatic subdural hydroma.
abstract: OBJECTIVE
  This study aimed to investigate the incidence and clinical characteristics of chronic subdural haematoma (CSDH) evolving from traumatic subdual hydroma (TSH).
  
  
  METHODS
  The clinical characteristics of 44 patients with CSDH evolving from TSH were analysed retrospectively and the relevant literature was reviewed.
  
  
  RESULTS
  In 22.6% of patients, TSH evolved into CSDH. The time required for this evolution was 14-100 days after injury. All patients were cured with haematoma drainage.
  
  
  CONCLUSIONS
  TSH is one possible origin of CSDH. The clinical characteristics of TSH evolving into CSDH include polarization of patient age and chronic small effusion. The injuries usually occur during deceleration and are accompanied by mild cerebral damage.
authors.affiliation: Department of Neurosurgery, Qilu Hospital of Shandong University , Jinan , PR China .
authors.forename: Yaodong
authors.initials: Y
authors.lastname: Wang
authors.forename: Chuanwei
authors.initials: C
authors.lastname: Wang
authors.forename: Yuguang
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D020208:Brain Injury, Chronic / Q000134:cerebrospinal fluid / Q000150:complications; D002648:Child; D002675:Child, Preschool; D020200:Hematoma, Subdural, Chronic / Q000134:cerebrospinal fluid / Q000000981:diagnostic imaging / Q000209:etiology*; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013353:Subdural Effusion / Q000134:cerebrospinal fluid / Q000150:complications* / Q000000981:diagnostic imaging; D013355:Subdural Space / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed
keywords: Chronic; haematoma subdural; subdural effusion; wound and injuries