Ultrasound findings of renal angiomyolipoma

Lee, Timothy G.; Henderson, Sidney C.; Freeny, Patrick C.; Raskin, Michael M.; Benson, Eric P.; Pearse, Harper D.

doi:10.1002/jcu.1870060305

Cited by 34 publications

(3 citation statements)

References 21 publications

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“…The reasons for this marked hyperechogenicity are sug-gested to be high fat content, hemorrhage, multiple nonfat interfaces, heterogeneous cellular architecture, or presence of numerous vessels within the AML. [14][15][16][17] Siegel and coworkers, 6 in their recent review of 35 AML with a mean diameter of 2.4 cm, reported that all the AML were hyperechoic relative to the renal cortex. Hartman and colleagues 8 reported that four of 10 large AML were not hyperechoic.…”

Section: Discussionmentioning

confidence: 99%

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

Sim

Seo

Kim

et al. 1999

Journal of Ultrasound in Medicine

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idespread use of ultrasonography and abdominal CT has increased the detection of small renal neoplasms, often found incidentally in asymptomatic patients. 1,2 RCC and AML are the most frequently occurring malignant and benign renal parenchymal tumors, respectively. Frequently small RCC are hyperechoic 1-3 and may mimic AML. 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. 3,7,[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. After digitizing the images, we measured the absolute gray scale values of the renal cortex, central echo complex, and mass. The relative gray scale value (%) of the mass was calculated by setting the gray scale value of the cortex as 0% and the central echo complex as 100%. The relative gray scale value of renal cell carcinomas was in the range of 12 to 73% (mean, 28%), whereas that of angiomyolipomas was 30 to 204% (mean, 130%). The differentiation between small hyperechoic renal cell carcinomas and angiomyolipomas can be facilitated by computer-aided tissue echo quantification.

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Section: Discussionmentioning

confidence: 99%

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

Sim

Seo

Kim

et al. 1999

Journal of Ultrasound in Medicine

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“…When not, differ ential diagnosis from adenocarcinoma may be difficult or even impossible since it is well known that in some cases the two tumors coexist in the same kidney [2,9,13,14]. Intravenous urography will reveal a renal mass and ultrasound will confirm the solid nature of the mass [2,8,15]. CT scan is expected to detect the presence of fat within the tumor (negative density) [8], Angiography is of no help because findings are similar with adenocarci noma [2,10].…”

Section: Discussionmentioning

confidence: 99%

Is Magnetic Resonance Imaging Insufficient in Diagnosing Preoperatively Renal Angiomyolipoma? A Case Report

Cranidis¹,

Anezinis²,

Constantinides

et al. 1989

Urol Int

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“…A similar difficulty in interpretation of the findings occurs when tumors contain a large proportion of muscular and vascular elements with only a small proportion of fatty tissue. If there are multiple lesions, as in the case reported here, a confusion of strongly echogenic tumors appears which are difficult to differentiate from the renal paren chyma [5,16,17], Differential diagnosis should take into account the possibility of lipoma, liposarcoma, lympho ma, cavernous hemangioma, infarct and, in rare cases, renal cell carcinoma.…”

Section: Recurrent Bleeding O F Angiomyolipomas In Tuberous Sclerosismentioning

confidence: 99%

Recurrent Bleeding of Angiomyolipomas in Tuberous Sclerosis

Chatterjee¹,

Heindel²,

Vorreuther

et al. 1996

Urol Int

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The diagnostic and therapeutic problems of renal hamartomas are illustrated by a case of recurrence of bleeding angiomyolipomas associated with tuberous sclerosis. Ultrasound and computed tomography provide clear evidence of lipomatous formation while, in rare instances, angiography can demonstrate the existence of multiple vascular tumor compartments. In view of the risk of bleeding, multiple or very large angiomyolipomas should be treated by interventional radiology in the form of superselective tumor embolization or by the most conservative surgery possible.

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Ultrasound findings of renal angiomyolipoma

Cited by 34 publications

References 21 publications

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

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

Is Magnetic Resonance Imaging Insufficient in Diagnosing Preoperatively Renal Angiomyolipoma? A Case Report

Recurrent Bleeding of Angiomyolipomas in Tuberous Sclerosis

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