Parotis Kitlelerinin Karakterizasyonunda Sonoelastografinin Yeri

Abstract

Objective: In this study, we investigated the effectiveness of sonoelastography, a new noninvasive test in the benign malignant differentiation of parotid lesions. Materials and methods: In this study, 34 patients who were admitted to Konya Education and Research Hospital Radiology Clinic-Ultrasonography Department between June 2012 and October 2013 with a preliminary diagnosis of parotid gland mass were examined prospectively. The ultrasonelastography results of the patients were recorded to compare with their definitive histopathological diagnosis. The evaluation was performed using a 12 MHz probe with a Toshiba aplio MX device (Toshiba Medikal, Nasu; Japan) with real-time elastography software. After the elastograms were obtained, the strain of the mass and adjacent normal parotid tissue was measured and proportioned with the help of 'region of interest' (ROI) in the relevant area. Results: The youngest of the 34 patients evaluated was 14 years old, the oldest was 85 years old, and the mean age was 51.76. Twenty patients were male (58.82%) and 14 were female (41.18%). In the histopathological evaluation of the cases, 47.05% were diagnosed as benign tumor, 38.24% were other benign lesions and 14.71% were diagnosed as malignant tumor. Considering only tumoral masses, 16 of 21 cases (76.19%) were benign (11 pleomorphic adenoma, 5 Whartin tumor) and 5 (23.81%) were malignant. Mean strain rate values were calculated as 1.67 ± 1.29 for benign masses and 2.27 ± 1.55 for malignant masses. No statistically significant difference was found in comparison of strain mean of malignant and benign masses (p = 0.357). Conclusion: We observed that sonoelastography was not effective in distinguishing malignant and benign masses of the parotid gland.