Fig. 2
From: Two in One: Epithelioid angiomyolipoma within a classic kidney angiomyolipoma - a case report
a B-mode ultrasound reveals two areas with different echogenicity within the tumor: Outer rim is hyperechoic with an echogenicity tumor to normal kidney cortex ratio (TQ) of 2.27 (a value larger than 2.0 is characteristic for angiomyolipoma) and an inner hypoechoic portion (TQ 0.47) [11]. b Time intensity curves (TIC) of the contrast enhanced ultrasound (CEUS) showing an early and strong enhancement of the hyperechoic outer rim (yellow line), similar to renal cortex (blue line), and a later and weaker enhancement of hypoechoic inner portion (red line). The strong enhancement of the outer tumor rim is clearly seen on the ventral side