Which structures are isoechoic or less echogenic than the liver?

Study liver anatomy and function with our medical students test. Engage with detailed multiple choice questions, each with hints and explanations. Prepare effectively for your test!

On ultrasound, echogenicity is judged relative to the liver, which serves as a common reference for brightness. Structures that are isoechoic (same brightness) or hypoechoic (less bright) compared with the liver will appear as dark or similar in brightness to the liver parenchyma. The right kidney cortex and the spleen typically match the liver’s echogenicity or appear slightly darker, making them isoechoic or less echogenic relative to the liver. In contrast, the renal sinus is very bright (hyperechoic) due to fat and fibrous tissue, and the pancreas is usually more echogenic than the liver, so they do not fit the criterion. Therefore, the right kidney and spleen are the structures that are isoechoic or less echogenic than the liver.