Echo-free and relatively echo-free "renal sinus lipomatosis".
Eleven echo-free and 37 relatively echo-free peripelvic lesions, primarily interpreted as sinus lipomatosis by experienced sonologists, were examined using CT. Eight echo-free lesions proved to be cysts and only three "fibrous fat". Hypodense peripelvic fat accumulations were not totally echo-free in any of the cases, but tended to show up weak echos.
D003560:Cysts / Q000175:diagnosis; D006801:Humans; D007674:Kidney Diseases / Q000175:diagnosis; D007680:Kidney Neoplasms / Q000175:diagnosis*; D007682:Kidney Pelvis; D008068:Lipomatosis / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography