This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Which of the following liver metastases appear hypoechoic on ultrasound 
Select and explain. 
A. Breast cancer, B. Colon cancer, C. RCC, D. Mucinous adenocarcinoma
A: Breast cancer
Answer: A: Breast cancer 
Explanation: Hepatic Metastases Metastases from breast cancer are typically hypoechoic (echo poor) on ultrasonography Metastases from carcinoma colon and RCC are typically hyoerechoic(echogenic) Metastases from mucinous adenocarcinoma of colon are typically calcified Sonographic pattern of hepatic metastases Echogenic- Neuroendocrine tumors, colonic carcinoma, Choriocarcinoma, RCC, Multifocal HCC Echopoor- Breast cancer, carcinoma pancreas, lung cancer, Lymphoma Ref: Focal liver lesions(springer)