Chronic Thromboembolic Pulmonary Hypertension Due to Popliteal Vein Aneurysm

Masakazu Tsubono; Kazuhiro Shimizu; Shuji Sato; Takuro Ito; Takanori Ikeda

doi:10.2147/IMCRJ.S280131

Chronic Thromboembolic Pulmonary Hypertension Due to Popliteal Vein Aneurysm

Int Med Case Rep J. 2021 Feb 17:14:101-106. doi: 10.2147/IMCRJ.S280131. eCollection 2021.

Authors

Masakazu Tsubono^{1

2}, Kazuhiro Shimizu², Shuji Sato², Takuro Ito², Takanori Ikeda¹

Affiliations

¹ Department of Internal Medicine, Toho University Omori Medical Center, Tokyo, Japan.
² Department of Internal Medicine, Toho University Sakura Medical Center, Chiba, Japan.

Abstract

Background: Venous thromboembolism (VTE) may present acutely as pulmonary embolism (PE), and its late complications include chronic thromboembolic pulmonary hypertension (CTEPH). PEs may arise from thrombi originating in a venous aneurysm, in rare cases of the popliteal vein.

Case presentation: A 77-year-old woman was referred to our hospital due to respiratory distress. Computed tomography revealed pulmonary thrombi and a thrombus in a popliteal vein aneurysm (PVA); PE was diagnosed. After 3 months of anticoagulant therapy (rivaroxaban), her pulmonary hypertension showed little improvement. She underwent perfusion scintigraphy, which showed multiple perfusion defects, and Swan-Ganz catheterization. Mean pulmonary artery pressure was 26 mmHg. Pulmonary angiography revealed organized distal thrombi. Based on these findings, we diagnosed CTEPH due to recurrent formation of thrombi in the PVA.

Conclusion: Asymptomatic PVA can lead silently to PE and CTEPH. The possibility of asymptomatic recurrent VTE should be considered in patients with pulmonary hypertension and PVA.

Keywords: chronic thromboembolic pulmonary hypertension; popliteal vein aneurysm; pulmonary embolism; pulmonary hypertension; venous thromboembolism.

Publication types

Case Reports