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Insights into Imaging
Fig. 9 | Insights into Imaging

Fig. 9

From: Ultrasound in active surveillance for low-risk papillary thyroid cancer: imaging considerations in case selection and disease surveillance

Fig. 9

Diagram representing risk classification of tracheal invasion by PTC based on angle of contact between the tumor and the tracheal cartilage (Figure adapted from Miyauchi A. Clinical Trials of Active Surveillance of Papillary Microcarcinoma of the Thyroid. World J Surg. 2016 Mar;40(3):516–22. https://doi.org/10.1007/s00268-015-3392-y)

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