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Start free with EleplanExtracranial carotid artery aneurysm
ORPHA:494424Morphological anomaly
Also called ECAA · ECCA
What it is
A rare vascular anomaly characterized by dilation of the internal or the common carotid artery greater than 150% of the diameter of the normal, healthy vessel. Lesions of the carotid bifurcation are typically fusiform, degenerative in nature, and may occur bilaterally, while saccular aneurysms are usually unilateral and mostly located in the middle segment of the internal carotid artery. Symptomatic patients may present with a palpable pulsating mass, local pain, cerebral ischemia, peripheral nerve dysfunction, stridor, or voice changes due to local compression.
Key facts
- Age of onset
- Adult, Elderly
- Inheritance
- Not applicable
- Classified as
- Morphological anomaly
Signs and symptoms
Common30–79%
6Sometimes5–29%
18- Abnormality of connective tissue
- Abnormal thrombosis
- Aphasia
- Arteriosclerosis
- Arteritis
- Cerebral ischemia
- Cranial nerve paralysis
- Diabetes mellitus
and 10 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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