Comparative Study on Spiral CT Enhancement Scan and Ultrasound Diagnosis of Polypoid Lesions of Gallbladder and Pathology

Objective To evaluate the clinical value of spiral CT enhancement scan and ultrasound in differential diagnosis of benign or malignant polypoid lesions of gallbladder.Methods Comparative study of the 18 patients whose imaging findings and pathology results had been recognized as polypoid lesion of gallbladder with the above techniques.The scope included benign lesion(cholesterol polypus,inflammatory polypus,thick-wall cholecystitis,adenomyomatosis of gallbladder,adenoma of gallbladder tumor) and malignant change(adenocarcinoma of the gallbladder,carcinoma of gallbladder).Results Among 18 cases of polypoid lesions of gallbladder,malignant accounted for 7 cases,benign accounted for 11 cases.Enhanced spiral CT scan diagnosis of malignant lesions of gallbladder had 6 cases,with qualitative accuracy of 85.71%(6/7).Ultrasound diagnosis of malignant lesions of gallbladder had 5 cases,with qualitative accuracy of 71.43%(5/7).Among 11 cases of benign lesions,7 cases' spiral CT enhancement scan and pathological diagnosis were consistent,with accuracy of 63.64%(7/11),while 10 cases' ultrasound examination and pathological diagnosis were consistent,with accuracy of 90.91%(10/11).Conclusion Spiral CT enhancement scan is advantagous in diagnosing malignant lesions of gallbladder and better than ultrasound diagnosis,neither of which can categorize the histologic type of malignant changes.However,ultrasound diagnosis is superior to spiral CT enhancement scan in distinguishing benign lesion of polypoid lesions of gallbladder,contributing more on diagnosis of cholesterol polypus.