Ultrasound:
Sonographic findings are not specific. The sonographic appearance
depends on the degree of the tumor infiltration and reactive fibrosis.
The most common features are solid masses with ill-defined margins,
either hypo or hyperechoic, taller than wide with marked posterior
shadowing and hyper vascularized. [11,12,14,28,41]. Marked
hypoechoic masses have been reported in 56% of the cases, posterior
acoustic shadowing in 48%, and mixed heterogeneous echotexture with
areas of hyperechogenic or entirely hyperechoic in 44% of the cases
[12,14,41]. Rarely they can be well circumscribed with posterior
acoustic enhancement, being reported in 36% of the cases [41].