![]() ![]() Eleven patients with B-SGTs had two masses in all cases, both masses were Warthin tumors. Thirty-one patients with M-SGTs and 176 with B-SGTs were included. The entire distribution comprised two other types: entire tumor cystic and hyperechoic separation evident inside. The scattered distribution comprised two types: tumors with a few small circular anechoic areas and tumors with a sponge-like appearance, in which large and small anechoic areas are finely mixed within the solid part. Evaluated imaging findings of cystic components included number (single or multiple), distribution, margin, occupying rate, and internal characteristics.ĭistribution was classified by location: eccentric, central, scattered, and entire (Fig. The margin characteristics were classified as well-defined or ill-defined from the surrounding normal gland tissue.Ĭystic components were defined as echoless on gray-scale US. Lesion shapes were divided into regular (round and oval) and irregular (including lobulated). Tumor size was considered to be the maximal length of the transverse section. ![]() Preoperative evaluationsĬlinical characteristics included sex, age, region, pathological type. Disagreements regarding the imaging features were resolved by consensus. They were blinded to the pathological types. Two certified radiologists with experience in head and neck imaging independently reviewed the US images. Data from the first preoperative examination were considered. The transducers used were 14L5 and LA533. US was performed using an Aplio 500 (Toshiba, Tokyo, Japan) and MyLab Twice (Esaote, Italy) systems. This study aimed to describe the US features of cystic components in SGTs and determine whether these features can be useful as indicators for differential diagnosis. No studies have compared the US manifestations of cystic components in SGTs. Magnetic resonance imaging (MRI) manifestations of cystic components in benign and malignant tumors differ. Ĭystic components have been reported as common imaging features of SGTs. US findings for the differentiation of B-SGTs and M-SGTs have been well described, primarily emphasizing the shape, margins, lymph node enlargement, and vascularity. US is considered a basic examination for the preoperative assessment of SGTs. Ultrasonography (US) is readily available, cost-effective, and widely accepted by patients. ![]() Accurate predictions of the histopathologic characteristics of tumors along with radiologic findings are useful for adequate surgical planning, especially for avoiding unnecessary surgeries and consequent complications. Malignant SGTs (M-SGTs) are mainly represented by mucoepidermoid carcinomas and adenoid-cystic carcinoma. Benign SGTs (B-SGTs) are predominantly represented by pleomorphic adenoma (PA) and Warthin’s tumor (WT). The parotid gland is the most common site, followed by the submandibular gland. Salivary gland tumors (SGTs) are rare, representing 2-6.5% of all head and neck neoplasms. Clinical relevanceĬystic components are potentially valuable in the differential diagnosis of B-SGTs and M-SGTs on US. Cystic component is of interest in the US-related differential diagnosis of B-SGT and M-SGT. US features of the B-SGTs and M-SGTs were significantly different. Cystic component features needed to be combined with lesion indicators (border and shape) to improve diagnostic sensitivity. Younger age (P = 0.001), eccentric distribution (P = 0.034) and ill-defined margin (P < 0.001) were risk factors for diagnosing M-SGTs. For SGTs with cystic components, the proportions of M-SGTs to ill-defined margins (P = 0.002), eccentric distribution (P = 0.019), and none of the internal characteristics (P = 0.019) were significantly higher than those of B-SGTs. Differences in sex and age of patients, number, distribution, and internal characteristics of cystic components were statistically significant. Similarities were observed between the US performance of benign SGTs (B-SGTs) and malignant SGTs (M-SGTs) with cystic components. Lesion size, shape, margin, and US findings of the cystic components, including number, distribution, margin, occupying rate, and internal characteristics, were evaluated. Preoperative US revealed the presence of cystic components in lesions. Materials and methodsĪ total of 207 patients (218 lesions) with pathologically confirmed primary SGTs were analyzed. The present study aimed to characterize the ultrasonography (US) features of cystic components in salivary gland tumors (SGTs). ![]()
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