Does acoustic radiation force elastography improve the diagnostic capability of ultrasound in the preoperative characterization of masses of the parotid gland.
Dentomaxillofac Radiol. 2018 May 10;:20180068
Authors: Zengel P, Notter F, Clevert DA
Abstract
OBJECTIVES: Ultrasound is the method of choice for preoperative evaluation of tumors of the parotid glands. However, existing methods do not allow for clear differentiation between the most common benign tumors and malignant tumors. The aim of our study was to evaluate if acoustic radiation force, Virtual Touch Quantification (VTQ) elastography helps to improve the preoperative evaluation of parotid masses.
METHODS: We investigated the parenchyma of 102 parotid glands, fourteen lymph nodes of healthy volunteers and 51 tumors of the parotid gland via ultrasound, color Doppler ultrasound and VTQ. The results were matched with histopathology and analyzed.
RESULTS: The perfusion in pleomorphic adenoma, the most frequent benign tumor of the parotid gland, was significantly lower in comparison to malignant tumors. All tumors showed statistically significant higher perfusion in comparison to the parenchyma or the lymph nodes of the gland. Shear wave velocity of the user-defined region of interest was statistically significant more frequently an overflow value higher than 8.5 m/s in total tumors in comparison to parenchyma or lymph nodes. The different tumor types presented no significant difference in the share wave velocity.
CONCLUSIONS: VTQ in combination with classical ultrasound examination provides additional data useful in distinguishing between benign and malignant tumors and thus shows promise for integration into preexisting ultrasound protocols. However, despite the improvement, clear differentiation of tumors is still not possible and further investigation is recommended.
PMID: 29745753 [PubMed - as supplied by publisher]
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