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Renal arteriovenous malformation: sonographic findings
H Naganuma1, H Ishida, K Konno
1First Department of Internal Medicine, Akita University School of Medicine, Hondo, Akita City, Japan.
Abdominal Imaging
|March 22, 2002
Summary
Renal arteriovenous malformation (RAVM) diagnosis is challenging with standard ultrasound. Color Doppler ultrasound is crucial for identifying RAVM, especially in patients presenting with hematuria.
Area of Science:
- Radiology
- Vascular Imaging
- Medical Diagnostics
Background:
- Renal arteriovenous malformation (RAVM) is a rare congenital condition.
- Standard sonography (US) is the initial kidney examination tool, but its findings in RAVM are infrequently reported.
- Understanding the role and limitations of US in RAVM diagnosis is essential.
Purpose of the Study:
- To clarify the diagnostic role and limitations of standard ultrasound (US) and color Doppler US in identifying renal arteriovenous malformations (RAVM).
Main Methods:
- Retrospective review of clinical data and ultrasound (US) findings from five RAVM cases.
- Evaluation of standard US and color Doppler US imaging characteristics.
- Correlation of imaging findings with clinical presentation.
Main Results:
- Lesions were solitary, affecting either the right or left kidney.
- Hematuria was the presenting symptom in four out of five patients.
- Standard US failed to detect the RAVM; however, color Doppler US revealed focal vascular lesions with posterior color spots in all cases.
Conclusions:
- Standard ultrasound (US) is not diagnostic for renal arteriovenous malformation (RAVM).
- Color Doppler ultrasound is essential for detecting RAVM.
- Immediate color Doppler US examination is recommended for patients presenting with hematuria.