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MR findings in diffuse renal parenchymal disease
U Kettritz1, R C Semelka, E D Brown
1Department of Radiology, University of North Carolina at Chapel Hill 27599-7510, USA.
Journal of Magnetic Resonance Imaging : JMRI
|January 1, 1996
Summary
This study used MRI to examine kidney appearance in diffuse renal parenchymal diseases. While no single feature is definitive, specific MRI findings may help differentiate various kidney conditions.
Area of Science:
- Radiology
- Nephrology
- Medical Imaging
Background:
- Diffuse renal parenchymal diseases encompass a wide range of kidney conditions affecting the functional tissue.
- Accurate diagnosis is crucial for effective management and treatment of kidney disease.
- Magnetic Resonance Imaging (MRI) offers detailed anatomical visualization of the kidneys.
Purpose of the Study:
- To evaluate the characteristic MR appearance of kidneys in various diffuse renal parenchymal diseases.
- To determine if specific MRI findings can aid in the differential diagnosis of these conditions.
- To correlate imaging findings with disease etiology and severity.
Main Methods:
- One hundred twenty-one patients with diagnosed renal diseases and 22 healthy controls underwent MRI.
- Utilized precontrast, immediate and delayed postgadolinium T1-weighted fat-suppressed spin-echo and gradient echo sequences.
- Evaluated parameters included corticomedullary differentiation (CMD), cortical thickness, and cortical irregularity.
Main Results:
- A strong inverse correlation was found between CMD and serum creatinine concentration (r = -.568, P < .001).
- Renal cortical thickness was significantly reduced in microvascular disease, tubulointerstitial disease, ischemic nephropathy, and obstructive nephropathy compared to controls (P < .01).
- Cortical irregularity was more frequent in microvascular disease, infectious renal disease, and obstructive nephropathy (P < .01). Diffuse high signal intensity in the medulla was noted in 25% of patients.
Conclusions:
- No single pathognomonic MR feature definitively identifies specific renal parenchymal diseases.
- However, observed MRI findings such as reduced cortical thickness and increased cortical irregularity may assist in differentiating between various kidney conditions.
- MRI can provide valuable information for the differential diagnosis of diffuse renal parenchymal diseases, complementing clinical and laboratory data.