Abstract: Objective The aim of this study was to summarize the imaging features of multi-slice spiral CT (MSCT) in patients with gallbladder adenomyosis and in patients with gallbladder carcinoma. Methods 113 patients with gallbladder adenomyosis and 78 with gallbladder carcinoma were enrolled in our hospital between September 2015 and September 2020, and all patients underwent MSCT and ultrasonography. The histophthological examination was performed after surgery. Results The consistency of diagnosis by MSCT based on postoperative histopathological examination (Kappa=0.749) was stronger than that by ultrasonography (Kappa=0.577); the accuracy rate by MSCT scan in the diagnosis of patients with gallbladder adenomyosis was higher than that by ultrasonography(88.0% vs. 79.6%, P<0.05); the diagnosis of special, local gallbladder adenomyosis, by MSCT was also higher than that by ultrasonography (97.1% vs. 82.9%, P<0.05); the CT scan showed that the percentages of smooth gallbladder walls, RAS sinus display and clear boundary between liver and gallbladder in patients with gallbladder adenomyosis were 36.3%, 36.3% and 69.0%, all significantly higher than 9.0%, 6.4% and 38.5% in patients with gallbladder carcinoma (P<0.05). Conclusion The diagnostic accuracy of patients with gallbladder adenomyosis by MSCT is relatively high, and its imaging feature might help discriminate gallbladder adenomyosis from cancer.

Key words: Gallbladder adenomyosis, Gallbladder carcinoma, Multisliecs helieal CT, Imaging feature, Diagnosis