Vasculitis-large vessel occlusion-CT angiography
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Right upper limb pain and numbness. History of autoimmune disease and arteritis.
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CT angiography of the right upper extremity arterial system showed:
Normal appearance of the subclavian artery with no stenotic or occlusive lesions
Occluded distal axillary and proximal segment of the brachial arteries as well as the anterior circumflex artery, with collateral refilling the brachial artery via the posterior circumflex artery
Patent radial artery which could be traced down to the wrist with attenuated non-opacified distal segment
Patent mildly attenuated ulnar artery with non opaicfied distal segment.
Patent common interossous, anterior and posterior inter-osseous arteries with attenuated non opacified their distal segments
Vasculitis represents an inflammatory process of the blood vessels. The most common types of vasculitis which affect the upper extremity include Takayasu arteritis, giant cell arteritis, and thromboangiitis obliterans. CTA can non-invasively diagnose vasculitis of large and medium arteries.
Vasculitis usually shows a long segment of stenosis with gentle tapering, in contrast to atherosclerosis in which there are focal stenosis and abrupt occlusion. Vessel wall thickening and enhancement are also characteristic signs of vasculitis and indicates an active phase of the disease.
Special thanks to Dr. Mohamed Ibrahim, Consultant of general radiology, Kasr Al Ainy Hospital
- Ugur Bozlar, Torel Ogur, Minhaj S. Khaja, Jaime All, Patrick T. Norton, Klaus D. Hagspiel. CT Angiography of the Upper Extremity Arterial System: Part 2— Clinical Applications Beyond Trauma Patients. (2013) American Journal of Roentgenology. doi:10.2214/AJR.13.11208