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Updated: Nov 19, 2025

Point-Of-Care Ultrasound Screening for Proximal Lower Extremity Deep Venous Thrombosis
Published on: February 10, 2023
RENAL VEIN THROMBOSIS DUE TO POSTERIOR NUTCRACKER SYNDROME.
Laura Lizama1, Sergio Bran1, Sven Kuestermann1
1HERRERA LLERANDI HOSPITAL, GUATEMALA CITY, GUATEMALA.
Left renal vein thrombosis, a rare condition, can stem from anatomical variations like posterior nutcracker syndrome. This case highlights its severe complication: thrombosis with pulmonary embolism.
Area of Science:
- Vascular Surgery
- Nephrology
- Radiology
Background:
- Left renal vein (LRV) thrombosis is uncommon, often linked to hypercoagulable states or extrinsic compression.
- Nutcracker phenomenon (NP) describes anatomical variations causing LRV compression, typically asymptomatic.
- NP variants include aortomesenteric angle narrowing, posterior nutcracker syndrome (PNCS), and duplicated LRV.
Observation:
- Posterior nutcracker syndrome (PNCS) involves LRV compression between the abdominal aorta and spine.
- Symptoms of NP include flank pain, varicocele, hematuria, and orthostatic proteinuria.
- LRV thrombosis is a severe complication of NP, potentially with prothrombotic factors.
Findings:
- This case presents a rare association of PNCS with LRV thrombosis.
- A floating thrombus in the inferior vena cava was identified.
- Pulmonary embolism was a significant complication in this patient.
Implications:
- Highlights the potential severity of asymptomatic anatomical variations like PNCS.
- Emphasizes the importance of considering NP in unexplained LRV thrombosis.
- Underscores the risk of thromboembolic events secondary to LRV compression and thrombosis.
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