Value of Thyroid Imaging Reporting and Data System in Initial Bethesda Category III Thyroid Nodules

Figure 1

Thyroid Imaging Reporting and Data System: (a) category 3, no suspicious ultrasound characteristics; (b) category 4a, one suspicious ultrasound characteristic (marked hypoechogenicity); (c) category 4b, two suspicious ultrasound characteristics (ill-defined margins and higher-than-wide); (d) category 4c, four suspicious ultrasound characteristics (solid components, marked hypoechogenicity, ill-defined margins, and higher-than-wide); (e) category 5, five suspicious ultrasound characteristics.

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