Abstract: Objective: To investigate the clinical application of colour Doppler ultrasound guided core biopsy (USCB) in the preoperative diagnosis of parotid tumors. Methods: Sixty-threepatients with parotid glandtumor, who had received USCB before operation, were included in this study from 2013-2015. The USCB results were compared with the postoperative pathological examinations. Results: In these 63 patients with parotid gland tumor, there were 56 cases whowere diagnosed with benign tumor by USCB, including 1 cases of mucoepidermoid carcinoma reported by postoperative pathological examination.The preoperative diagnostic coincidence rate was 98.2%. And 7 cases were diagnosed with malignant tumor by USCB and the preoperative diagnostic coincidence rate was 100%. There were 11 cases who had complicationafter the operation of USCB, 6 patients felt pain in the operation areaand 5 patients had swelling in the operation area and no injury to the facial nerve after USCB. Conclusion: USCB is quite effective in diagnosis of parotid tumors with less postoperativecomplications and non-reversible damage.

Key words: Diagnosis of parotid tumors, Colour , Doppler ultrasound-guided core biopsy (USCB), Postoperative , Pathology