Renal sinus lipomatosis

Renal sinus lipomatosis refers to a condition where there is excessive renal sinus fat replacement.

It results from renal parenchymal atrophy, inflammation, calculous disease, ageing or exogenous or endogenous steroids.

There is usually no or rarely little mass effect on collecting system.

Variants
  • replacement lipomatosis of the kidney
    • this is is an advanced massive form of renal sinus lipomatosis, in which infection, renal calculi and long-standing hydronephrosis are accompanied by severe renal parenchymal atrophy, might be with mass effect causing attenuation and stretching of collecting system. 
Ultrasound

Often shows enlarged echogenic central sinuses. The central distribution of adipose tissue in the renal sinus is considered characteristic.

CT/MRI

Useful for confirming pure fat content.

Possible differential considerations include:

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Article information

rID: 26280
System: Urogenital
Section: Pathology
Tag: cases
Synonyms or Alternate Spellings:
  • Lipomatosis of the renal sinus
  • Lipomatosis of the renal sinuses

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