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