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Journal of Medical Ultrasonics

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1993 - Vol.20

Vol.20 No.09

Original Article(原著)

(0512 - 0517)


Histopathologic Features of Small Renal Tumors with Hyperechoic Appearances

水関 清1, 近藤 俊文2, 高原 完祐1

Kiyoshi MIZUSEKI1, Toshifumi KONDO2, Kansuke TAKAHARA1

1宇和島市国民健康保険九島診療所, 2市立宇和島病院内科

1Uwajima Municipal Kushima Medical Center, 2Department of Internal Medicine, Uwajima Municipal Hospital

キーワード : Kidney neoplasms, Ultrasonic diagnosis, Cystic nephroma

Eighteen cases of small renal tumors with homogeneously hyperechoic appearances were studied. Histologically, the tumors consisted of 12 benign tumors (including 11 angiomyolipomas and 1 multilocular cystic nephroma) and 6 malignant tumors (including 5 renal cell carcinomas and 1 renal metastasis from lung cancer). The internal echo level of the benign tumors were significantly higher than that of the malignant tumors, although there were no significant differences in the irregularity of the tumor contours.
Although multilocular cystic nephroma is said to exhibit a multiloculated hypoechoic or anechoic appearance, our case of cystic nephroma showed a homogeneously hyperechoic pattern, mimicking an angiomyolipoma.