Arachnoid Cyst is it a Risk Factor for Chronic Subdural Hematoma in Young Adults? (A Report of Four Cases and Review of Literature)

Background: Chronic subdural hematomas (CSDH) tend to occur in elderly patientswith a history of mild head injury few weeks prior to the onset of symptoms. Arachnoidcysts (AC) are relatively common congenital intracranial mass lesions that arise duringthe development of the meninges. However, these two distinct clinical entitiessporadically occur together in relatively young patients. Objective: In light of aliterature review, a trial to explain the association between arachnoid cyst and subduralhematoma is proposed. Patients Methods: This is a report of four cases presentedwith chronic subdural hematoma over the frontoparietal region, with an incidentalfinding of an arachnoid cyst over the Sylvian fissure. Results: Three patients were malesand one female. Age ranged from ten years to forty one years. All patients had history ofminor head trauma. Their symptoms were due to intracranial hypertension, like thosewith isolated CSDH. All patients’ symptoms regressed after evacuation of CSDH.Conclusion: Arachnoid cyst is a possible risk factor for subdural hematoma in youngadults. A burr hole procedure with drainage of hematoma is an adequate treatment.