Multimodality-imaging manifestations of primary renal-allograft synovial sarcoma: First case report and literature review

Figure 5 Contrast-enhanced computed tomography showed that the neoplasms became bigger one month later. A and B: Non-enhancing images showing slightly hyper-density neoplasms (white stars) without distinct margins; C-F: Enhanced multiphase computed tomography image revealing slow, heterogeneous enhancement inside the neoplasms, with few spotty and patchy non-enhanced foci (yellow arrows); E and F: The venous phase images showing more clear margins than other phases.