heterogeneous hypoechoic lesionsubcutaneous hypoechoic lesionirregular hypoechoic lesionhypoechoic avascular lesionhypoechoic lesion pancreashypoechoic lesion in thyroidhypoechoic cystic lesionhypoechoic lesion ovaryhypoechoic lesion in spleenhypoechoic lesion in uterushypoechoic solid lesionhypoechoic lesion kidney