Fig. 1
From: Primary hepatic neuroendocrine tumors: multi-modal imaging features with pathological correlations
CT scan axial images (a-c). Multiple well-circumscribed, heterogeneous, and hypodense liver masses were observed (largest in the right lobe with size of 6.4×6.3×5.0 cm) (a), lesions showed significant enhancement in the arterial phase (b), and scope of enhancement was close to or slightly higher than the attenuation of the surrounding normal liver parenchyma and indistinct edge of small lesions during portal phases (c). The background liver was not cirrhotic. MR images (d-i). T2WI (d) and DWI (b = 800) (e): well-circumscribed, high signal intensity, lobulated masses were observed. Precontrast T1WI (f): lesions were well circumscribed and heterogeneous, and showed hypointensity. Enhanced MR images showed significant enhancement of the solid tumor portion in the early arterial phase, continued enhancement in the portal venous phase (g), definite defects in the 5 min delayed hepatobiliary phase, and well-rim arc-shaped artery vessels on the lesion side in the coronal image (h). DSA angiography: multiple hypervascular tumor staining regions with sharp edges were observed in the arterial phase (i)