The diagnostic value of dual-phase enhanced spiral CT scanning in common benign and malignant garotid glands / 中国医师进修杂志

ABSTRACT

Objective:To evaluate the diagnostic value of dual-phase enhanced spiral CT scanning in common benign and malignant parotid gland tumors.Methods:Sixty-four cases of parotid tumors confirmed by operation and pathology in Zhejiang Quhua Hospital from January 2016 to January2019 were retrospectively analyzed. The morphological characteristics of benign and malignant parotid tumors and the enhancement characteristics of common parotid tumors were compared.Results:Among 64 parotid tumors, there were 50 cases (78.1%) of benign tumor, 26cases (52.0%) of pleomorphic adenoma, 17cases (34.0%) of adenolymphoma, 7 cases (14.0%) of other benign tumors, and the coincidence rate of dual-phase enhanced spiral CT scanning in diagnosis of benign parotid gland tumors was 88.0%(44/50). Fourteen cases (21.9%) had malignant tumor, 5 cases(5/14) had mucoepidermoid carcinoma, 9 cases had other malignant tumors, and the coincidence rate of dual-phase enhanced spiral CT scanning in diagnosis of malignant parotid gland tumors was 12/14. The total coincidence rate of dual-phase enhanced spiral CT scanning was 87.5%(56/64). The clear boundary and no lymphadenectasis were the characteristic of benign tumor, and fuzzy boundary and lymphadenectasis were the characteristic of malignant tumor. There were no significant differences between benign tumor and malignant tumor in outline and cystic change ( P>0.05). The arterial stage enhancement rate of adenolymphoma was higher than that of pleomorphic adenoma and mucoepidermoid carcinoma (2.78 ± 0.90 vs. 1.69 ± 0.32 and 1.97 ± 0.64), the parenchymal phaseenhancement rate was lower than that of pleomorphic adenoma and mucoepidermoid carcinoma (1.69 ± 0.56 vs. 2.13 ± 0.74 and 2.24 ± 0.50), and there were significant differences ( P<0.05). The clearance rate (CWR) of pleomorphic adenoma was lower than that of adenolymphoma and mucoepidermoid carcinoma(-0.20 ± 0.15 vs. 2.34 ± 0.37 and 0.19 ± 0.07), and the CWR of mucoepidermoid carcinoma was lower than that of adenolymphoma (0.19 ± 0.07 vs. 2.34 ± 0.37), and there were significant differences ( P<0.05). Conclusions:Thedual-phase enhanced spiral CT scanning in the diagnosis of common benign and malignant parotid gland tumors is of great value.