Complicated thrombosed popliteal venous aneurysm in an adolescent managed by aneurysmorrhaphy with a literature review.

Popliteal venous aneurysm is a rare vascular entity associated with a high risk of thromboembolic complications. We report the case of a 16-year-old girl presenting with acute left lower-limb pain and swelling. Magnetic resonance imaging revealed a large thrombosed popliteal venous aneurysm (60 × 40 × 34 mm). The patient underwent aneurysmotomy with thrombus evacuation and lateral venorrhaphy via a posterior (Triquet) approach with proximal and distal venous control. Postoperative recovery was uneventful with complete symptom resolution. At the 17-month follow-up, duplex ultrasound examination confirmed sustained venous patency without recurrence or thromboembolic events. Vein-preserving aneurysmorrhaphy appears to be an effective surgical option in adolescents, preventing pulmonary embolism and maintaining venous continuity.