Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma

Figure 1

Computed tomography findings. (a) A plain axial section. The tumor was mainly composed of adipose tissue with thick irregular septum-like structures. (b) A contrast-enhanced axial section. The septum-like structures showed early enhancement. (c) A contrast-enhanced coronal section. There was no beak sign or sharp beak shape arising from the kidneys.

(a)

(b)

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