Pancreatic paraganglioma with multiple lymph node metastases found by spectral computed tomography: A case report and review of the literature

Figure 4 Region of interest plot of Hounsfield unit attenuation. The Hounsfield unit attenuation plots of the tumor (purple) and lymph nodes 2 (red) and 3 (blue) have similar slopes, suggesting that the lymph nodes 2 and 3 were most likely metastatic lymph nodes (confirmed by pathological examination). LN: Lymph node; HU: Hounsfield unit.