Imaging-Cytology Correlation of Thyroid Nodules with Initially Benign Cytology

Figure 4

Comparison of malignancy rates in thyroid nodules with benign cytology according to initial US features or imaging-cytology concordance. Error bars for 95% confidence intervals. value < 0.001. ^†Concordant lesions include some nodules which had suspicious US features on initial US but were acceptable for benign cytology in postbiopsy image review as well as nodules without suspicious US features on initial US. ^‡Discordant lesions include nodules which were initially suspected for malignancy on US and were still regarded as suspicious even after obtaining benign cytology.