Arachnoid Cysts of the Middle Fossa Predispose to Subdural Haematoma Formation Fact or Fiction?

Arachnoid Cyst With Spontaneous Subdural Hematoma and Intracystic Hemorrhage in a Child

“…Tearing of the outer wall of the arachnoid cyst is associated with subdural or intracystic hemorrhage inflicted by a rupture of bridging veins, unsupported blood vessels around the cyst wall, and leptomeningeal vessels located at the base of the cyst (15)(16)(17). The arachnoid cyst may enlarge overtime as a result of secretion of fluid from the cyst walls (18)(19)(20) …”

Arachnoid Cyst with Spontaneous Intracystic Hemorrhage and Chronic Subdural Hematoma

“…The ensuing increased pressure may rupture into the subdural, extradural, or intracystic space and manifest as a hematoma if there is also an accompanying vascular disruption 5) . On radiological examinations, an intracystic hemorrhage may mask the presence of an arachnoid cyst 7,11) . In some cases it is difficult to distinguish an arachnoid cyst from a sub-acute or chronic intracystic or SDH.…”

“…Membranectomy and cyst communication to the basal cisterns must be performed 4,11,16) . In our case, we performed craniotomy and confirmed the presence of the SDH and evacuated it.…”

Untitled

“…6,7,22,29 Patients with arachnoid cysts may also present with hemorrhagic events, especially following head trauma. 1,19,20,23 Younger patients (Ͻ 2 years of age) are more likely to present with nonspecific macrocephaly than other symptoms or signs. 7,15,17 In the current study, one half of all patients presented with macrocephaly without underlying ventriculomegaly.…”