Angiomyolipoma: Imaging findings in lesions with minimal fat

Masahiro Jinzaki, Akihiro Tanimoto, Yoshiaki Narimatsu, Kiyoshi Ohkuma, Tadayoshi Kurata, Hiroshi Shinmoto, Kyoichi Hiramatsu, Makio Mukai, Masaru Murai

研究成果: Article査読

101 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)493-496
ページ数4
ジャーナルRadiology
205
2
出版ステータスPublished - 1997 12 1

ASJC Scopus subject areas

  • 放射線学、核医学およびイメージング

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