Introduction: Thyroid nodule is a discrete lesion within the thyroid gland that is palpable and /or 
sonographically distinct from the surrounding thyroid parenchyma. Aim of the Work: To evaluate 
the diagnostic value of the MRI diffusion in differentiation between benign and malignant thyroid 
nodule in correlation with fine needle aspiration cytology. Patient And Methods: This study will be 
conducted in the department of diagnostic and interventional Radiology, Faculty of Medicine, Minia 
University starting from May 2019 and after being ethically approved by department committee.