**6.3 CT/MRI**

CT/MRI is generally not recommended in evaluation of MNG. These modalities of imaging do not have any advantage over ultrasonography in description of intrathyroidal structure. These imaging modalities are useful only when malignancy is suspected or goiter is retrosternal in which MRI is more precise than CT. CT/MRI provides more information about the surrounding tissue in relation to the thyroid, i.e., trachea, esophagus, and neck vessels. So these imaging modalities are used when features of tracheal compression/deviation, dysphagia, vocal cord paralysis, and weight loss are present. CT/MRI provides additional anatomical information to be helpful preoperatively for planning of surgical excision.
