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Updated: Jul 10, 2026
In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses
Published on: March 30, 2015
Replacement lipomatosis: CT and MRI findings of a rare renal mass
M Kocaoglu1, U Bozlar, H T Sanal
1Gulhane Military Medical School, Department of Radiology, Ankara, Turkey. kocaoglumurat@yahoo.com
Abstract:
Replacement lipomatosis of the kidney (RLK) is an advanced form of renal sinus lipomatosis, in which infection, renal calculi and long-standing hydronephrosis are accompanied by renal parenchymal atrophy. The kidneys are usually poor or non-functioning. We present CT and MRI findings of an unusual focal RLK of a 52-year-old male, who was examined with the suspicion of renal malignancy.
Insights
Replacement lipomatosis of the kidney (RLK) is an advanced renal sinus lipomatosis. This case report details unusual focal RLK findings on CT and MRI in a patient suspected of renal malignancy.
Area of Science:
- Radiology
- Urology
- Medical Imaging
Background:
- Renal sinus lipomatosis (RSL) involves excess fat in the renal sinus.
- Replacement lipomatosis of the kidney (RLK) is an advanced RSL stage.
- RLK is associated with infection, stones, hydronephrosis, and parenchymal atrophy, often leading to non-functioning kidneys.
Observation:
- A 52-year-old male presented with suspected renal malignancy.
- Unusual focal RLK was identified in the patient.
- CT and MRI were utilized to examine the focal RLK presentation.
Findings:
- The study presents CT and MRI findings of a rare focal RLK.
- The imaging characteristics of this focal RLK are detailed.
- The findings highlight an atypical presentation of RLK.
Implications:
- This case expands the understanding of RLK imaging manifestations.
- Accurate diagnosis of focal RLK is crucial to differentiate from renal malignancy.
- Highlights the importance of advanced imaging in diagnosing rare renal conditions.
