Cystic adventitial disease is a rare but clinically important vascular mimic of atherosclerosis, aneurysm, and embolic disease — especially in younger patients with claudication and few cardiovascular risk factors. This SAIMSARA evidence map compresses scattered case-level evidence into a practical diagnostic and treatment roadmap, linking popliteal dominance, synovial/articular origin theories, imaging clues, recurrence risk, and surgical versus percutaneous strategies.
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Abstract: The aim of this scoping review is to synthesize evidence regarding the clinical presentation, diagnostic identification, pathophysiological theories, and therapeutic management of cystic adventitial degeneration (CAD). The review utilises 24 original studies with 41 total participants (topic deduplicated ΣN). The mapped evidence indicates that CAD is a predominantly popliteal arterial pathology, accounting for 85–90% of reported cases, with a recurrent mechanistic signal supporting an articular or synovial origin via ectopic joint capsule tissue or arthrogenic mesenchyme. Across the synthesized topics, 360-degree resection with autologous venous interposition emerged as the dominant therapeutic signal associated with durable patency and absence of recurrence over median follow-up of approximately 36 months, whereas simple cyst evacuation was linked to higher recurrence. Duplex sonography and intravascular ultrasound were consistently highlighted for detecting extrinsic luminal compression, while MRI and MRA supported evaluation of recurrent disease. Less-invasive options, including ultrasound-guided aspiration and image-guided ethanol sclerosis for venous involvement, represent viable alternatives in selected patients. Clinically, these signals support maintaining a high index of suspicion for CAD in younger patients with claudication lacking traditional cardiovascular risk factors, given the diagnostic mimicry with atherosclerosis and aneurysmal disease. Because the evidence base is dominated by small retrospective case series, future prospective comparative studies of radical resection versus percutaneous techniques, alongside standardized imaging criteria and immunohistochemical characterization of cyst linings, are needed to clarify optimal management across arterial and venous sites.
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Final search date and database lock: 2026-05-07 13:56:12 CEST
Plan: Pro (expanded craft tokens; source: PubMed)
Source: PubMed
Total Abstracts/Papers: 107
Downloaded Abstracts/Papers: 107
Included original and non-original Abstracts/Papers (all): 30
Included original Abstracts/Papers (Vote counting by direction of effect): 24
Reference Index (links used in paper): 27
Total participants (topic deduplicated ΣN): 41
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The Evidence Object JSON is a separate machine-readable evidence product: a concentrated synthesis of results, topic-level evidence, and discussion across original and non-original studies. It can be directly input into your LLM, agent, or RAG workflow.
[3] An unexpected intraoperative finding of cystic adventitial degeneration of the common femoral artery. — https://doi.org/10.1093/jscr/rjaa200
[4] A Case of Cystic Adventitial Degeneration of the Left Popliteal Artery Diagnosed by Intravascular Ultrasound. — https://doi.org/10.4137/ccrep.s38175
[6] Sustained remission 11 years after percutaneous ultrasound-guided aspiration for cystic adventitial degeneration in the popliteal artery. — https://doi.org/10.1177/152660280701400221
[7] Intravascular ultrasound diagnosis of cystic adventitial degeneration of the popliteal artery: a case report. — https://doi.org/10.1002/ccd.1216
[8] [Rare cause of calf pain in a 56-year-old female patient: cystic adventitial degeneration of the popliteal artery]. — https://doi.org/10.1055/a-1976-4185
[9] [Recurrence of cystic adventitial degeneration of the popliteal artery--magnetic resonance tomography and MR angiography]. — https://doi.org/10.1007/s001170051019
[24] [Cystic adventitial degeneration of the popliteal artery. Rare cause of intermittent claudication in middle-aged adults]. — https://doi.org/10.1007/s002920050244
