Rare CTA finding - Duplication of the superficial femoral ar
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An extremely rare case of duplicated superficial femoral artery (SFA) was incidentally observed on computed tomography angiogram (CTA) of the lower limbs for presurgical planning for an osteomyocutaneous fibula flap in a patient with T4a oropharyngeal squamous cell carcinoma (SCC). To our knowledge, this is the sixth reported case in the imaging literature. We performed a comprehensive review of the English literature and discuss the underlying embryological origin underpinning this rare anatomical variant.

Case Report
A 65-year-old man with T4a oropharyngeal squamous cell carcinoma (SCC) underwent CTA of the lower limbs for presurgical planning of a fibula osteomyocutaneous flap. The patient did not complain of claudication symptoms; however, there was a history of significant vascular risk factors including a 20-pack/year smoking history, hypertension, and hypercholesterolemia. CTA of the lower limbs shows duplication of the left SFA into two vessels of equal luminal caliber (Fig. 1), 4 cm from its origin and extending over 20?cm before converging at the adductor canal to reform a single SFA.

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