Strain elastography of palatal tumors in conjunction with intraoral ultrasonography, computed tomography, and magnetic resonance imaging: 2 case reports

Abstract

Ultrasonography is most extensively used for preoperative imaging as part of the diagnosis of oral and maxillofacial lesions. 1 In recent years, shear wave elastography has been shown to be an effective technique for the objective and quantitative diagnosis of cervical lymph node metastases of oral carcinoma. 2,3 Intraoral ultrasonography has been used to assess features of tongue cancer, including the border, size, location, depth, vascularity, and histological findings of the mass. 4,5 Strain elastography (performed together with intraoral ultrasonography) is relatively new to sonographic imaging, and the use of intraoral strain elastography for tongue cancer has been recently reported in the literature. 6,7 Computed tomography (CT), 8,9 magnetic resonance imaging (MRI), 10 and ultrasonography 11 can be useful for the preoperative evaluation of palatal lesions. However, to the best of our knowledge, intraoral strain elastography of pal-atal lesions has not been extensively described in the literature. This report describes 2 clinical cases in which strain elastography was used to assess palatal tumors in conjunction with intraoral ultrasonography, CT, and MRI.

Intraoral ultrasonography for gingival squamous cell carcinoma: Tumor thickness and bone invasion

“…Panoramic radiographs were obtained with a panoramic machine (Veraviewepocs; J Morita Corp., Kyoto, Japan) using maxillofacial protocol at our hospital, with a tube voltage of 70 kV and a tube current of 10 mA. Grayscale and color Doppler US were performed using a liner 14 MHz transducer (Aplio 300; Canon Medical Systems, Otawara, Japan) by two oral and maxillofacial radiologists, following our institutional protocol 14–16 . Scanning had performed with the patient in the semi‐prone position on dental unit.…”

“…Grayscale and color Doppler US were performed using a liner 14 MHz transducer (Aplio 300; Canon Medical Systems, Otawara, Japan) by two oral and maxillofacial radiologists, following our institutional protocol. [14][15][16] Scanning had performed with the patient in the semi-prone position on dental unit. We used echo gel pad 100 Â 100 Â 3 mm (EP-S-03; Yasojima proceed, Hyogo, Japan) and plastic wrap in our study.…”