Cystic adventitial disease of the femoral vein presenting as deep vein thrombosis: A case report and review of the literature

Cystic adventitial disease of veins is a rare condition. We report the case of a 28-year-old man who presented with a swollen leg secondary to obstruction of the common femoral vein as a result of this disease. He underwent excision of the cyst and made a full recovery. The presentation, investigation, treatment and pathology of this condition is discussed.