Ver el código de «Posterior Communicating Artery (PCOM) Aneurysm»

==Background==
*Acute [[CN III palsy]] with ipsilateral pupil dilation is PCOM aneurysm until proven otherwise
**Aneurysm compresses the outer fibers (pupillomotor) of CN III -> dilation
**In contrast to CN III palsy due to diabetes mellitus or hypertension in which pupil is spared

==Clinical Features==
*Inhibition of ipsilateral medial gaze, upward gaze, downward gaze, ptosis
**Lateral gaze (abduction) is preserved
*Ipsilateral dilated pupil

==Differential Diagnosis==

==Evaluation==

==Management==
*Emergent BP reduction if hypertensive
*Neuroimaging
*Neurosurgical consult

==Disposition==

==References==

[[Category:Neurology]]
[[Category:Vascular]]