Clinical Analysis of Subdural Hygroma

We have analysed 111 cases of subdural hygroma that were development after various neurosurgical conditions including head injuries. The results were summarized as follows. 1) The peak incidence was the age of 50's and occured most frequently in male. 2) Causes were head injuries(91 cases), traumatic intracranial hematoma removal(10 cases), operation for intracranial aneurysms(4 cases), hypertensive intracerebral hemorrhage evacuation(2 cases), ventriculoperitoneal shunt(2 cases), brian tumor removal(1 cases), arachnoid cyst excision(1 cases), and cerebral infarction(1 cases). 3) Acute subdural hematoma was most often associated with complex subdural hygrom. 4) Clinical manifestations were headache, altered mental state, disorientation, nausea in order. 5) Operation were underwent in 27 cases and surgical complications were reaccumulation and pneumocephalus in order. 6) Mortality rate was 6.3%. 7) The prognois of the simple hygroma was very good, but the complex was not.

A Clinical Analysis of Traumatic Subdural Hygroma

The authors report a series of 40 cases of traumatic subdural hygroma and discuss the clinical and radiological features, management, surgical results, and pathogenesis. The "simple hygroma" accounted for majority of cases (78%) and among "complex hygroma" cases, subdural hematoma was most often accompanied. Skull fractures was found in 33% of cases. Bilateral subdural hygroma were seen in 67% and delayed onset were noted in 10 cases(25%). Changes in mental status without focal signs of neurologic deficit was noted in over 50% of cases. Although 75% of cases showed full recovery, clinical course marked by persistence of neurologic deficit was noted in 12.5% of cases. Operation was underwent in 72% and simple burr hole drainage was done in most of cases. Reaccumulation rate was relatively high (27.5%) after initial operation. The mortality rate was 12.5.