Multimodal imaging techniques for the diagnosis of congenital left renal arteriovenous fistula: A case report

Figure 4 Computed tomography enhancement examination. A: Early visualization of the left renal vein in the arterial phase, with the left renal artery as the blood-supplying artery. The left renal vein is markedly thickened, with localized verrucous dilatation; B: The left renal artery branch is in traffic with the left renal vein, and a rounded hypodense shadow is observed in the middle of the left kidney, which is not significantly strengthened after contrast; C: Nodular isodense shadow in the middle and lower pole of the left kidney, with note able uneven enhancement after contrast, and the left renal artery branch is seen to traffic with the left renal vein. Orange arrow: Left renal arteriovenous fistula.