Thrombosed Popliteal Artery Pseudoaneurysm as Herald of Tibial Osteochondroma

• Published in: EJVES Short Reports Vol. 33; pp. 27 - 31
• Main Authors: Ruales Romero, A.M., Doiz Artazcoz, E., Craven-Bartle Coll, A., Gonzalez Calbo, A., Rodríguez Piñero, M.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 2016; Elsevier
• Subjects: Case Report; Osteochondroma; Popliteal artery; Pseudoaneurysm; Tibial exostosis; Osteochondroma; Popliteal artery; Tibial exostosis; Pseudoaneurysm
• ISSN: 2405-6553; 2405-6553
• DOI: 10.1016/j.ejvssr.2016.09.004

Osteochondroma is the most common non-malignant tumour of bone, accounting for approximately one third of benign lesions in the skeleton. They often develop around the knee in the distal femur and in the proximal tibia and fibula. They present as a painless slow growing mass during adolescence and have been reported to cause damage to adjacent structures such as blood vessels; arterial damage is more common than venous injury and is usually a result of compression, stretching, and rubbing of the arterial wall. Such lesions include stenosis, thrombosis, and pseudoaneurysm formation possibly causing lower limb claudication or acute limb ischemia.
An 18 year old male patient with a 4 week history of pain, hematoma, and oedema of the left calf without previous trauma is reported. A computed tomography scan (CT) revealed a large popliteal artery pseudoaneurysm and its close relationship to a protrusion of the proximal tibia.
The popliteal artery was repaired by an external saphenous patch and the exostosis was removed. The patient had palpable popliteal and distal pulses after surgery and during the first year follow-up.
Tibial osteochondroma should be considered in the differential diagnosis in young patients, among the potential causes of pseudoaneurysm of the femoral or popliteal artery. Surgical repair should be performed to restore normal blood flow with resection of the exostosis to prevent recurrence.
•Young previously healthy patient presents with symptoms of acute limb ischeamia.•Contrast tomographic scan showed thrombosed popliteal pseudoaneurysm and an exostosis of the proximal tibia.•Intraoperative findings suggest the tibial exostosis was damaging the popliteal artery by causing friction.•Distal femoral to second portion of popliteal artery bypass revascularisation was performed, restoring normal arterial flow to the distal limb.•Histologic analysis showed the exostosis consisted on osteochondroma.