Delayed tine Displacement of a CASPER Carotid Artery Stent due to Styloid Process Compression
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Eagle syndrome results from an elongated styloid process or calcified stylohyoid ligament causing impingement [1, 2]. This interaction causes injury to the carotid artery which may result in pseudoaneurysm, dissection or focal stenosis . A similar interaction may occur when carotid stents are placed due to the alteration in biomechanics.
Stent fracture and deformation have been reported for laser-cut stents, with overall rates of fracture and deformation ranging from 3% at 1 year, to 50% at 4 years, and this can be complicated by restenosis in up to 36% [3, 4]. Fractures are associated with densely calcified arteries, angulated arteries and open cell stent designs [3, 4, 5]; however, most published case series are based on stents in the proximal internal carotid artery and carotid bulb, a location which experiences high torsional strain and has exposure to external compression [3, 4, 5].
The CASPER (Microvention Terumo, Aliseo Viejo, CA, USA) carotid stent is a woven...
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Conflict of interest
D. Tan, M. Crockett and A.H.Y. Chiu declare that they have no competing interests.
All procedures reported in this article were in accordance with the ethical standards of the National Health and Medical Research Council Australia and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The patient provided informed consent for publication of images and text regarding the medical condition.