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The sonographic features of six renal "pseudotumors" representing septa of Bertin are described. Septa of Bertin are isoechoic with renal parenchyma and demonstrate a characteristic splaying of the central sinus echoes. CT performed in all six cases revealed the "mass" to be normally enhancing renal cortex. The characteristic radiographic features of septa of Bertin are reviewed and the split sinus sign is discussed.
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Mahony et al. (1983) studied this question.
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