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

Figure 2 Contrast-enhanced computed tomography showed multiple neoplasms inside the renal allograft. A and B: Non-enhancing images showing slightly hyper-density neoplasms without distinct margins; C-F: Enhanced multiphase computed tomography (CT) images revealing slow, relatively homogeneous enhancement inside the neoplasms. Enhanced CT venous-phase image showing a small spotty non-enhanced focus (yellow arrow).