Posterior communicating artery aneurysm presenting with haemorrhage into an arachnoid cyst.
A patient is reported on with a subarachnoid haemorrhage (SAH) from an aneurysm of the posterior communicating artery, who initially presented with a sentinel bleed into an arachnoid cyst and normal magnetic resonance angiography (MRA) of the intracranial vasculature which led to a delay in diagnosis. Although this is a very rare presentation of a relatively common condition, it is important to recognise the importance of intracystic haemorrhage in such circumstances as well as the limitations of MRA, as a delay in diagnosis may have serious clinical consequences.
Barker
R A
RA
National Hospital for Neurology and Neurosurgery, London, UK.
Phillips
R R
RR
Moseley
I F
IF
Taylor
W J
WJ
Kitchen
N D
ND
Scadding
J W
JW
D000328:Adult; D016080:Arachnoid Cysts / Q000150:complications*; D002533:Cerebral Angiography; D002536:Cerebral Arteries; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications*; D018810:Magnetic Resonance Angiography; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000175:diagnosis* / Q000209:etiology*; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis* / Q000209:etiology*; D014057:Tomography, X-Ray Computed