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