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Updated: Nov 19, 2025

Point-Of-Care Ultrasound Screening for Proximal Lower Extremity Deep Venous Thrombosis
Published on: February 10, 2023
Venous Adventitial Cyst Mimicking a Persistent Femoral Deep Venous Thrombosis
Rebekah Tan1, Patrik Tosenovsky1
1Department of Vascular and Endovascular Surgery, Royal Perth Hospital, Perth, Australia.
Objective:
We describe the case of lower limb unilateral swelling due to a cystic mass (adventitial cystic disease) compressing on the common femoral vein. This was misdiagnosed as a deep vein thrombosis on both computed tomography venography and Doppler ultrasound.
Method:
We describe the diagnostic pathways and surgical excision of this venous adventitial cyst of the femoral vein.
Conclusion:
Venous adventitial cysts are a rare occurrence and diagnosis remains difficult. It often presents clinically as a Deep Vein Thrombosis (DVT). Suspicions should be raised should symptoms persist despite appropriate DVT management. Surgical management include endovascular, minimally invasive procedures, and complete evacuation of the mucoid cyst with excision of the cystic wall.
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