Angiomyolipoma: imaging findings in lesions with minimal fat.

Abstract

PURPOSE To investigate a method of diagnosing angiomyolipoma that contains minimal fat. MATERIALS AND METHODS In six cases of angiomyolipoma with minimal fat, the attenuation on contrast material-enhanced and unenhanced computed tomographic (CT) images, the echogenicity on sonograms, the signal intensity on T2-weighted magnetic resonance (MR) images, and the gross configuration of the lesion were retrospectively analyzed. In 100 cases of renal cell carcinoma, the same parameters were analyzed, and results were compared with those of angiomyolipoma. RESULTS When compared with the surrounding renal parenchyma, all six angiomyolipomas showed homogeneously high attenuation on unenhanced CT images, homogeneous enhancement on contrast-enhanced CT images, and homogeneous isoechogenicity on sonograms. Of the five angiomyolipomas examined with MR imaging, four were hypointense and one was isointense on T2-weighted images. All six angiomyolipomas protruded from the renal margin. None of the 100 renal cell carcinomas showed homogeneously high attenuation on unenhanced CT images, homogeneous enhancement on contrast-enhanced CT images, or homogeneous isoechogenicity on sonograms. CONCLUSION In the kidney, homogeneously high attenuation on unenhanced CT images, homogeneous enhancement on contrast-enhanced CT images, and homogeneous isoechogenicity on sonograms are suggestive of angiomyolipoma that contains abundant muscle and minimal fat.

0200400'01'03'05'07'09'11'13'15'17
Citations per Year

1,950 Citations

Semantic Scholar estimates that this publication has 1,950 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@article{Jinzaki1997AngiomyolipomaIF, title={Angiomyolipoma: imaging findings in lesions with minimal fat.}, author={Masahiro Jinzaki and Akihiro Tanimoto and Yoshiaki Narimatsu and Kiyoshi Ohkuma and Tomoko Kurata and Hiroshi Shinmoto and K. Hiramatsu and Masaya Mukai and Masaru Murai}, journal={Radiology}, year={1997}, volume={205 2}, pages={497-502} }