<prompt> Which of the following liver mets appear hypoechoic on USG?Ca. ColonCa. BreastCa. BladderMucinous adenocarcinoma  <response>: Hypoechoic lesions can be secondary to lymphoma, melanoma, breast and lung carcinoma, and less commonly, related to gastrointestinal malignant tumors. Ref: Liver Malignancies: Diagnostic and Interventional Radiology By Carlo Baolozzi, Riccardo Lencioni, 1999, Page 180 