Fig. 1. Various ultrasonographic findings of thyroid papillary microcarcinoma (PTMC). Extrathyroidal extension to anterior aspect (arrow head) (A) or to posterior aspect (arrow heads) (B), abutting status to trachea of PTMC can be detected in preoperative ultrasound. Multifocal (D) or bilateral (E) PTMCs can be also identified in ultrasound.
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