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Small solid renal lesions: usefulness of power Doppler US
M Jinzaki1, K Ohkuma, A Tanimoto
1Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan.
Radiology
|November 10, 1998
Summary
Power Doppler ultrasonography (US) enhances diagnostic accuracy for small solid renal lesions when combined with gray-scale US. This combined approach improves the differentiation of renal cell carcinomas from other masses.
Area of Science:
- Radiology
- Medical Imaging
- Oncology
Background:
- Differentiating small solid renal lesions is crucial for appropriate patient management.
- Gray-scale ultrasonography (US) has limitations in characterizing these lesions.
- Power Doppler US offers additional vascular information.
Purpose of the Study:
- To determine if power Doppler US improves diagnostic accuracy for small solid renal lesions compared to gray-scale US alone.
- To evaluate the utility of vascular patterns in power Doppler US for lesion characterization.
Main Methods:
- Prospective study of 64 small solid renal lesions (1.5-3.0 cm).
- Lesions included renal cell carcinomas (RCCs), angiomyolipomas, oncocytomas, and pseudotumors.
- Gray-scale and power Doppler US features were analyzed, including vascular patterns.
Main Results:
- Combined US significantly increased correct diagnosis rates (78%) versus gray-scale (42%) or power Doppler (45%) alone.
- Specific vascular patterns in power Doppler US helped differentiate RCCs from angiomyolipomas.
- Gray-scale features like anechoic rim or intratumoral cysts were noted in RCCs and oncocytomas.
Conclusions:
- Power Doppler US vascular patterns provide valuable information for the differential diagnosis of small solid renal lesions.
- Combining power Doppler US with gray-scale US enhances diagnostic accuracy.
- This integrated approach aids in distinguishing between different types of renal masses.