Figure 2.

Case 2: male, 48 years old; a multilocular cystic was found in his right renal upper pole. (a) An multilocular cystic with size of 6.0 × 5.1 × 5.8 cm was found (arrow) and irregular thick walls inside the tumor was displayed (arrow head). (b) By partial enlarged view, the multilocular cystic was displayed in detail (arrow) and the irregular thick wall (arrow head). (c) By color Doppler flow imaging (CDFI) mode, the cystic thick walls (arrow), the subcapsular of tumor, and the nodule inside tumor were detected by spot color Doppler signal. (d) By CEUS, the nodule inside the tumor showed hyperenhancement and the thick walls showed isoenhancement in the early phase (arrow).