“…Taller-than-wide shape (antero-posterior radius is greater than transvers radius), irregular margins and hypoechogenicity are also shown to be associated with malignancy in undetermined nodules (Jeong et al, 2013;Lee et al, 2014;Yu et al, 2014). In a study by Rosario et al, an original definition for "suspicious ultrasonographic findings" was used for AUS/FLUS nodules, which already has demonstrated the value for benign, follicular neoplasm and suspicious for malignancy groups (Rosario and Purisch, 2010;Rosario, 2014). According to this definition, presence of marked hypoechogenicity or microcalcifications or hypoechogenicity is considered as suspicious for malignancy when it is combined with any of the following; microlobulation, irregular margins, taller-than-wide shape and predominantly or exclusively central vascularization.…”