Fig. 3From: Added value of contrast-enhanced ultrasound (CEUS) in the diagnosis of primary retroperitoneal serous adenocarcinoma: a case reportUltrasound appearance of the PRSA. a Conventional ultrasound shows an unilocular cystic lesion with papillary excrescences measured 3.0 * 1.4 cm (arrow). b Color Doppler image shows the solid papillary projection contains internal flow (arrow). c, d Hyper-enhancement of cystic wall, intracystic septations, and intracystic solid components is found in the arterial phase on CEUS (arrow)Back to article page