1. Diagnostic performance of 2015 American Thyroid Association guidelines and inter- observer variability in assigning risk category 
Zhiyu Pang, Myles Margolis, Ravi J. Menezes, Hassaan Maan, Sangeet Ghai 
European Journal of Radiology Open 
Volume 6, Pages (January 2019)
DOI: /j.ejro
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2. Fig. 1
Sonographic patterns of 4, 4b, 5 and 5x in the study a. Sonographic pattern of Intermediate Suspicion (4): Hypoechoic solid nodule with smooth margins without microcalcifications, extrathyroidal extension, or taller than wide shape. 40-year-old female with papillary thyroid carcinoma. b. Sonographic pattern 4b: Hypoechoic and isoechoic areas to adjacent thyroid parenchyma, solid nodule with smooth margins without microcalcifications, extrathyroidal extension, or taller than wide shape. 48-year-old female with benign thyroid nodule. c. Sonographic pattern of high suspicion (5): solid hypoechoic nodule with microcalcifications. 40-year-old female with papillary thyroid carcinoma. d. Sonographic pattern of 5x: isoechoic nodule with taller-than-wide shape. 36-year-old female with benign thyroid nodule.
European Journal of Radiology Open 2019 6, DOI: ( /j.ejro )
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