Venous aneurysms are rare. Popliteal venous aneurysm can lead to severe complications such as deep vein thrombosis, pulmonary emboli and death if they remain undiagnosed or untreated. The authors report a case of popliteal vein aneurysm in the right popliteal fossa of a 60-year-old male cadaver. Most venous aneurysms have a congenital origin. An early diagnosis of popliteal venous aneurysm with ultrasound examination is essential prior to the occurrence of any thromboembolic or other major complications.