Angiomyolipoma and renal cell carcinoma: US differentiation.

Abstract

In hyperechoic renal masses, the presence of shadowing, a hypoechoic rim, and intratumoral cysts are important findings that may help distinguish AML from RCC.

Differentiation of small hyperechoic renal cell carcinoma from angiomyolipoma: computer-aided tissue echo quantification.

“…Efforts were made to differentiate the two conditions on the basis of ultrasonographic characteristics such as intratumoral cysts, hypoechoic rim, and posterior acoustic shadowing. [3][4][5][6] These findings were fairly specific but not sensitive enough. 6,7 In our experience as well as that of others, AML tend to be more echogenic than RCC.…”

“…[3][4][5][6] These findings were fairly specific but not sensitive enough. 6,7 In our experience as well as that of others, AML tend to be more echogenic than RCC. 3,7,[8][9][10] Some investigators tried to differentiate these two tumors using a visual assessment of echogenicity alone without satisfactory results.…”

“…3,7,[8][9][10] Some investigators tried to differentiate these two tumors using a visual assessment of echogenicity alone without satisfactory results. 3,6 The purposes of this study were to evaluate the echogenicity of renal masses objectively and quantitatively by using CATEQ technique and to assess the value of this technique in differentiating small hyperechoic RCC from AML. To assess the value of computer-aided tissue echo quantification in differentiating small hyperechoic renal cell carcinomas from angiomyolipomas, we studied ultrasonographic images of 15 renal cell carcinomas and 20 angiomyolipomas.…”

Radiologic Imaging of Renal Masses

“…Category IV lesions are mostly all malignant tumors. [25] CATEGORY DESCRIPTION I A benign simple cyst with a hairline thin wall that does not contain septa, calcifications, or solid components. It measures water density and does not enhance.…”

“…The typical but not diagnostic finding of AML on ultrasonography is a well-circumscribed, highly echogenic lesion, often associated with shadowing. [37,25] The finding of shadowing should suggest an AML rather than a small, echogenic RCC, which rarely shadows [25]. In terms of differentiation and characterization of solid renal masses using ultrasonography, the presence of shadowing, a hypoechoic rim, and intratumoral cysts are thought to be important findings that may help distinguish angiomyolipomas from other solid lesions, namely renal cell carcinoma.…”