Transient Focal Neurological Episodes Linked to Convexity Subarachnoid Hemorrhage in Severe Ipsilateral Extracranial Internal Carotid Artery Stenosis: A Case Study and Brief Literature Overview - Takeaways - MDSpire

Transient Focal Neurological Episodes Linked to Convexity Subarachnoid Hemorrhage in Severe Ipsilateral Extracranial Internal Carotid Artery Stenosis: A Case Study and Brief Literature Overview

  • By

  • Jozsef Norbert Nemes

  • Emil Ferencz

  • Peter Klivenyi

  • Levente Szalardy

  • February 19, 2026

  • 0 min

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  • 1

    Spontaneous convexity subarachnoid hemorrhage (cSAH) accounts for 5-10% of all SAHs and is often underdiagnosed in clinical settings.

  • 2

    Cerebral amyloid angiopathy is the most common cause of non-traumatic cSAH in elderly patients, leading to transient focal neurological episodes.

  • 3

    In younger patients, common causes of cSAH include posterior reversible encephalopathy syndrome and reversible cerebral vasoconstriction syndrome.

  • 4

    A 46-year-old female presented with repetitive transient focal neurological episodes and multiple ipsilateral cSAHs due to severe extracranial ICA stenosis.

  • 5

    The patient was successfully treated with antiepileptics and carotid endarterectomy after comprehensive diagnostic work-up.

Original Source(s)

Transient Focal Neurological Episodes Linked to Convexity Subarachnoid Hemorrhage in Severe Ipsilateral Extracranial Internal Carotid Artery Stenosis: A Case Study and Brief Literature Overview

  • by Jozsef Norbert Nemes, Emil Ferencz, Peter Klivenyi, Levente Szalardy

  • February 19, 2026

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