Combining polyp diameter and polyp‐to‐bile ratio by dynamic contrast‐enhanced CT scanning can improve the diagnostic specificity of gallbladder neoplastic polyps

Objective This study aimed to distinguish between cholesterol and neoplastic gallbladder polyps using dynamic contrast‐enhanced CT. Methods The dataset retrospectively comprised 222 cases, including 106 cases of cholesterol polyps and 116 cases of neoplastic polyps (59 adenoma and 57 adenocarcinoma). The perception and Hounsfield units of the polyps and gallbladder bile were assessed by contrast‐enhanced CT, and the polyp‐to‐bile ratio (PBR) was calculated. Receiver operating characteristic (ROC) curves and area under the curve analyses were used to assess the diagnostic value of the diameter and PBR for neoplastic polyps. Results The diameter of cholesterol polyps was significantly smaller than that of neoplastic polyps. The proportion of perceived cholesterol polyps in the plain and arterial phases of CT were significantly lower than those of neoplastic polyps (p