Table 1.

Studies relevant to cranioplasty as the treatment for contralateral subdural effusion (SDE).^3,6,^7,12

Study	Case number	Male:female	Age, years	Primary disease	Preoperative duration	Treatment and outcome
Wan et al. 20166	13	7:6	Mean of 32.1 (range, 21–35)	Severe traumatic brain injury	Within 1 week	Six patients underwent temporal muscle sticking and seven underwent early cranioplasty. The contralateral SDE in all 13 patients was successfully resolved.
Salunke et al. 20157	7	6:1	Mean of 32.1 (range, 27–52)	Six traumatic brain injuries and one middle cerebral artery infarction and aneurismal subarachnoid haemorrhage	Mean of 27.4 days (range, 5–62 days)	Five patients underwent burr-hole drainage that failed after temporary improvements and then cranioplasty was performed. Two patients received cranioplasty directly. SDE in the seven patients resolved eventually, but three patients subsequently developed hydrocephalus and ventriculoperitoneal shunt procedures were then performed.
Su et al. 20113	13	11:2	Mean of 45.7 (range, 29–75)	Traumatic brain injury	Mean of 13 days (range, 3–22 days)	Six patients were treated conservatively. Six patients received burr-hole craniectomy to evacuate the SDE; of which, four patients were successfully treated and the other two patients subsequently received a subduroperitoneal shunt. In one patient, subduroperitoneal shunt and cranioplasty were simultaneously performed.
Kilincer et al. 200512	1	1:0	56	Aneurismal subarachnoid haemorrhage and middle cerebral artery infarction	1 week	Burr-hole drainage was firstly used but the contralateral SDE quickly recurred. Then complete resolution of the effusion was achieved through a cranioplasty and subduroperitoneal shunt procedure.