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Related Experiment Videos

Intrarenal arteriovenous fistula causing a "pseudonutcracker effect".

Banu Yagmurlu1, Hasan Ozcan, Suat Kemal Aytaç

  • 1Department of Radiology, University of Ankara School of Medicine, Ibn-i Sina Hospital, 06100 Samanpazari, Ankara, Turkey.

Journal of Clinical Ultrasound : JCU
|February 22, 2002
PubMed
Summary

An intrarenal arteriovenous fistula mimicked the nutcracker effect, causing left renal vein compression. Successful coil embolization resolved the condition, leading to the proposed term "pseudonutcracker effect".

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Area of Science:

  • Nephrology
  • Vascular Surgery
  • Diagnostic Imaging

Background:

  • The nutcracker effect, or renal vein compression, typically results from anatomical variations.
  • Intrarenal arteriovenous fistulas are rare vascular abnormalities.

Observation:

  • A case presented with symptoms mimicking the nutcracker effect due to an intrarenal arteriovenous fistula.
  • Color Doppler sonography revealed left renal artery and vein abnormalities, including stenosis and kinking.
  • Angiography confirmed the presence of the arteriovenous fistula.

Findings:

  • The arteriovenous fistula caused significant left renal vein dilatation and compression.
  • Successful coil embolization led to fistula obliteration.
  • Post-embolization sonography demonstrated regression of vein dilatation and normalization of flow velocities.

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Implications:

  • This case highlights a rare cause of the nutcracker effect.
  • The term "pseudonutcracker effect" is proposed for this fistula-induced phenomenon.
  • Interventional radiology offers an effective treatment for such conditions.