الفهرس 
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Abstract
Imaging evaluation of the neck has undergone progressive changes as a result of rapid development of diagnostic imaging technology. Quick and accurate diagnosis directly affects treatment success for patients with a neck mass, Inadequate or late diagnosis of a malignant mass increases the morbidity and mortality of a disease. Ultrasonography (USG) and/or computed tomography (CT) are used as conventional methods for the evaluation of neck lesions. MRI is used for the characterization of neck masses. It evaluates the morphology, signal intensity and enhancement pattern of lesions. However, in some cases, the differentiation between benign and malignant lesions remains challenging, this has led to the necessity of researching new diagnostic techniques. Diffusion-weighted MRI (DWI) is increasingly researched and applied in head and neck cancer with the aim of improving tumor detection and characterization, regional and distant staging, as well as the detection of tumor recurrence after treatment. The objective of this work was to assess the role of DWI for characterization of neck masses. Patients with neck masses were referred from NT, nuclear medicine and clinical oncology departments. Convectional MRI, DWI-MRI with calculation of ADC value were performed. Thirty patients were included in this study (16 males and 14 females) with their ages ranged from 6 - 75 years.