Renal Angiomyolipoma Mimicking a Well-Differentiated Retroperitoneal Liposarcoma

Figure 2

Magnetic resonance imaging findings. (a) Fat-suppressed T1-weighted scans. The tumor was mainly composed of a homogenously low-intensity area, including a weakly high-intensity area with thick irregular septum-like structures. (b) Dynamic contrast-enhanced image. The septum-like structures showed strong enhancement. There was no beak sign or sharp beak shape arising from the kidneys. (c) Coronal section of dynamic contrast-enhanced image. The tumor surrounded the right kidney with no beak sign.

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