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Renal masses: evaluation with gradient-echo Gd-DTPA-enhanced dynamic MR imaging
S S Eilenberg1, J K Lee, J Brown
1Mallinckrodt Institute of Radiology, St Louis, MO 63110.
Radiology
|August 1, 1990
Summary
Dynamic contrast-enhanced MRI effectively detects and characterizes renal masses. This technique differentiates simple cysts from tumors like renal cell carcinomas, angiomyolipomas, and oncocytomas based on enhancement patterns.
Area of Science:
- Radiology
- Medical Imaging
- Nephrology
Background:
- Renal masses require accurate detection and characterization.
- Magnetic Resonance (MR) imaging offers advanced visualization capabilities.
Purpose of the Study:
- To evaluate the utility of dynamic contrast-enhanced gradient-echo MR imaging in differentiating renal masses.
- To assess enhancement patterns of various renal neoplasms and cysts.
Main Methods:
- Dynamic contrast-enhanced gradient-echo MR imaging with gadolinium diethylenetriaminepentaacetic acid (DTPA) was used.
- Sequential imaging during and after contrast administration, including delayed scans, was performed.
- Time-intensity curves analyzed renal cortical and medullary enhancement.
Main Results:
- Simple renal cysts showed no enhancement and were hypointense compared to the renal cortex.
- Renal cell carcinomas exhibited variable enhancement patterns (peripheral, heterogeneous, homogeneous).
- Angiomyolipoma and oncocytoma demonstrated brisk, homogeneous enhancement.
Conclusions:
- Dynamic contrast-enhanced MR imaging is valuable for detecting and characterizing renal masses.
- Distinct enhancement patterns aid in differentiating simple cysts from solid renal neoplasms.