Exophytic renal angiomyolipoma and perirenal liposarcoma:CT features analysis / 实用放射学杂志

ABSTRACT

Objective To compare the CT findings of exophytic renal angiomyolipoma and perirenal liposarcoma.Methods CT data of 20 patients with exophytic renal angiomyolipoma and 20 pateints with perirenal liposarcoma were reviewed by two radiologists blinded to the clinical and pathological findings.These findings were compared between exophytic renal angiomyolipoma and perirenal liposarcoma using the Student t-test and Fisher 's exact test.Results Exophytic renal angiomyolipomas were smaller (P <0.05)and more commonly showed the following findings(P <0.05)renal parenchymal defect in 20 patietns,aneurysmal dilatation of intratumoral vessels in 18 patients,renal parenchymal vascular pedicle in 20 patients,supply of renal artery branches in 20 patients,hemorrhage in 6 patietns and combination with other intrarenal fatty lesions in 5 patients.Whereas,the findings associated with perirenal liposarcoma were non-fat soft tissue node in 20 patients (P <0.05)and kidney displacement in 19 patients (P <0.05).No significant difference was seen in calcification and sexuality(P >0.05).Conclusion Several CT findings were significantly different between exophytic renal angiomyolipoma and perirenal liposarcoma,which can be helpful for differentiating the two tumors,and provides the accurate imaging basis for the next therapy.