ABSTRACT
Objective To explore the clinical characteristics of evolutionary type of traumatic subdural hydroma(ETTSH) and experiences of diagnosis and treatment of ETTSH. Methods The clinical data of 37 patients with ETTSH were analyzed retrospectively. Results The patients ages were from 3 months to 75 years old, most of primary craniocerebral injuries were mild, the main clinical manifestation was chronic increased intracranial pressure, and the final diagnosis time by CT scanning was 28 to 110 days after craniocerebral injury. All patients had a good prognosis by surgical drainage. Conclusion Polarized age, mild primary craniocerebral injury and chronic increased intracranial pressure are the main clinical characteristics of ETTSH. Dynamic CT scanning and surgical drainage were the first choice of diagnosis and treatment of ETTSH, respectively.