title: The efficacy of magnetic resonance imaging and color Doppler ultrasonography in diagnosis of salivary gland tumors.
abstract: Background and aims. Although salivary gland tumors are not very common, early diagnosis and treatment is crucial because of their proximity to vital organs, and therefore, determining the efficacy of new imaging procedures becomes important. This study aimed to evaluate the efficacy of magnetic resonance imaging (MRI) and color doppler ultrasonography parameters in the diagnosis and differentiation of benign and malignant salivary gland tumors. Materials and methods. In this cross-sectional study, color doppler ultrasonography and MRI were performed for 22 patients with salivary gland tumor. Demographic data as well as MRI, color doppler ultrasonography, and surgical parameters including tumor site, signal in MRI images, ultrasound echo, tumor border, lymphadenopathy, invasion, perfusion, vascular resistance index (RI), vascular pulse index (PI) were analyzed using Chi-square test, Fisher's exact test, and independent t-test. Results. The mean age of patients was 46.59±13.97 years (8 males and 14females). Patients with malignant tumors were older (P < 0.01). The most common tumors were pleomorphic adenoma (36.4%), metastasis (36.4%), and mucoepidermoid carcinoma (9%). Nine tumors (40.9%) were benign and 13 (59.1%) were malignant. The overall accuracy of MRI and color doppler ultrasonography in determining tumor site was 100% and 95%, respectively. No significant difference observed between RI and PI and the diagnosis of tumor. Conclusion. Both MRI and ultrasonography have high accuracy in the localization of tumors. Well-identified border was a sign of benign tumors. Also, invasion to adjacent structures was a predictive factor for malignancy.
authors.affiliation: Assistant Professor, Department of Radiology, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Behrooz
authors.initials: B
authors.lastname: Davachi
authors.affiliation: Professor, Oral and Maxillofacial Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mahrokh
authors.initials: M
authors.lastname: Imanimoghaddam
authors.affiliation: Assistant Professor, Department of Otorhinolaryngology, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mohamad Reza
authors.initials: MR
authors.lastname: Majidi
authors.affiliation: Associate Professor, Department of Radiology, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Sahebalam
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Masoomeh
authors.initials: M
authors.lastname: Johari
authors.affiliation: Assistant Professor, Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Adineh
authors.initials: A
authors.lastname: Javadian Langaroodi
authors.affiliation: Professor, Department of Biostatistics, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mohamad Taghi
authors.initials: MT
authors.lastname: Shakeri
keywords: Color; doppler; magnetic resonance imaging; salivary gland neoplasms; ultrasonography