CT Feature Analysis of Common Benign Tumors of Parotid Gland

Objective: To analyze the clinical and CT manifestations of common benign parotid gland tumors, so as to improve the preoperative diagnosis accuracy. Methods: Clinical data and CT imaging data of 45 patients with parotid gland benign tumor confirmed by surgery and pathology were retrospectively analyzed. Results: Among the 45 patients, there were 24 cases of pleomorphic adenoma (all single), 6 cases of basal cell adenoma (all single), 15 cases of adenoma (5 cases of single occurrence, 10 cases of multiple occurrence, 5 cases of bilateral multiple occurrence). Ten patients with adenocarcinoma had a long history of smoking. Pleomorphic adenoma presents progressive enhancement. Basal-cell adenoma showed significant enhancement in arterial stage and venous stage, and decreased slightly in venous stage compared with arterial stage. Adenocarcinoma presents as "fast in, fast out", and may have vascular border signs; 3 patients had different enhancement methods, and the difference of enhancement was statistically significant (P<0.05). Conclusion: The common benign tumors of parotid gland have some CT features, which is helpful to improve the preoperative diagnosis accuracy.