Figure 4 A splenic TB lesion with septation-like enhancement. (A) Conventional US demonstrates a hypoehoic lesion in the splenic envelope with a well-defined border (arrows); (B–D) CEUS demonstrates that the lesion begins to enhance from the splenic envelope at 30 s after injection of SonoVue (B, arrow) toward the peritoneum. Its internal area is presented with septation-like enhancement at 32 s (C, head arrows), which is completely washed out in the late parenchymal phase. The marginal area is iso-enhanced compared with the peripheral splenic parenchyma (D, arrows).