The incidence of venous aneurysm is less than arterial aneurysms. Most of them are incidental findings with no major clinical significance. However, popliteal vein aneurysms may be potentially life threatening as they can be a source of pulmonary embolism and potentially even death. We report a case of right popliteal vein aneurysm in a 67-year-old male cadaver. Information from this case study may contribute to an improved understanding of these phenomena, including early detection of these or similar thromboembolic events.