FGF23 and bile duct papillary neoplasm: Similarly, in the remaining included study, FGF-23 circulating levels were significantly higher in the presence of plaques with higher grades of IMVF signal on the semi-quantitative-SMI visual scale (p = 0.011, r = 0.466)—patients in the extensive-IPN group had increased plasma levels of FGF-23 compared to the other patient groups—and higher neovessel count recorded by quantitative SMI (p = 0.007, r = 0.491) [24].