microlobulated hypoechoic massheterogeneous hypoechoic masshomogeneous hypoechoic masscircumscribed hypoechoic massirregular hypoechoic masshypoechoic testicular masshypoechoic vascular masshypoechoic mass pancreashypoechoic avascular masshypoechoic mass lesionhypoechoic solid masslobulated hypoechoic mass