Expected headings
"Variants"
"Renal sinus lipomatosis results from renal parenchymal atrophy, inflammation, calculous disease, ageing 1, or exogenous or endogenous steroids. There is usually no or rarely little mass effect on the collecting system."
"replacement lipomatosis of the kidney: 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 the collecting system 1"