Successful treatment of acquired arteriovenous fistula following iliac vein thrombosis

Objectives Cases of arteriovenous fistula following iliac vein thrombosis are uncommon. The pathogenesis of its formation remains unclear. We present the efficacy of left common iliac vein recanalization in acquired arteriovenous fistula treatment. Methods A 71-year-old man presented with severe lower left limb edema and was diagnosed with acquired arteriovenous fistula following iliac vein thrombosis. Treatment by recanalizing the left common iliac vein with bare stents was selected over embolizing the arteriovenous fistula, leading to an excellent clinical outcome. Results and Conclusions: Acquired arteriovenous fistula should be considered in some patients with post-thrombotic syndrome. Endovascular recanalization without embolization of the arteriovenous fistula can effectively treat iliac vein thrombosis associated with arteriovenous fistula.

Case Report: Concomitant Massive Cerebral Venous Thrombosis and Internal Iliac Vein Thrombosis Related to Paucisymptomatic COVID-19 Infection

Thrombotic complications are common in COVID-19 patients, but cerebral venous system involvement, timing after infection, optimal treatment, and long-term outcome are uncertain. We report a case of massive cerebral venous thrombosis and concomitant internal iliac vein thrombosis occurring in the late phase of paucisymptomatic COVID-19 infection. Mild respiratory symptoms, without fever, started 3 weeks before headache and acute neurological deficits. The patient had silent hypoxemia and typical COVID-19 associated interstitial pneumonia. Brain CT scan showed a left parietal hypodense lesion with associated sulcal subarachnoid hemorrhage. CT cerebral venography showed a massive cerebral venous thrombosis involving the right transverse sinus, the right jugular bulb, the superior sagittal sinus, the straight sinus, the vein of Galen, and both internal cerebral veins. Abdominal CT scan showed no malignancy but revealed an asymptomatic right internal iliac vein thrombosis. Both cerebral venous thrombosis and pelvic vein thrombosis were effectively treated with unfractionated heparin started on the day of admission, then shifted to low molecular weight heparin, with a favorable clinical course. Nasopharyngel swab, repeated twice, tested negative for SARS-CoV-2. Serological tests confirmed SARS-CoV-2 infection. Our case supports active surveillance and prevention of thrombotic complications associated with COVID-19, which may affect both peripheral and cerebral venous system. Early initiation of unfractionated heparin may lead to good neurologic outcome.

An Eminent Absence: Agenesis of Inferior Vena Cava Underlying Bilateral Iliac Vein Thrombosis

Among thrombophilic risk factors for deep venous thrombosis (DVT), agenesis of the inferior vena cava (AIVC) is very rare, but it must be considered in specific settings. Here, we present the case of an 18-year-old woman who was admitted to the Emergency Department with swelling and pain of her left leg. Clinical examination and ultrasonography detected extensive proximal DVT of the left leg. After attempted mechanical thrombectomy failed, an abdominal CT scan was obtained, which demonstrated bilateral thrombosis of the iliac-femoral axis in the context of congenital AIVC.