Ultrasonography RUQA 15.4-cm lesion in the RMCL with a smooth contour and mildly heterogeneous echogenicity was identified. A 4.7 x 2.7 x 2.6 cm mostly hypoechoic, ovoid mass in the inferior aspect of the posterior right hepatic lobe contained a 1.6 x 1.1 x 1.3 cm focal hypoechoic structure with a mildly hyperechoic rim internally.