**6.1 Thyroid ultrasonography**

Thyroid ultrasound is the most widely accepted imaging modality to know the characteristic of MNG. Ultrasound can give information regarding the number of nodules and the size and location of nodules within the thyroid. It also provides information regarding the presence or absence of any suspicious cervical lymph nodes in the neck. Thyroid sonography can also describe features including composition (solid, cystic proportion, or spongiform), echogenicity, margins, presence and type of calcifications, shape if taller than wide, and vascularity which helps in making decision of FNAC (**Figure 1**). Thyroid ultrasound is commonly used in ultrasound guided FNAC for greater yield in diagnosis.
