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Table 3 [810, 2640, 86]: FNA recommendations for diagnostic FNA based on sonographic features

From: RETRACTED ARTICLE: Thyroid nodules update in diagnosis and management

A. Nodules ≥1 cm with high suspicion sonographic pattern  
B. Nodules ≥1 cm with intermediate suspicion sonographic pattern  
C. Nodules ≥1.5 cm with low suspicion sonographic pattern  
D. Nodules ≥2 cm with very low suspicion sonographic pattern (e.g., spongiform)  
E. FNA is not required for thyroid nodules that do not meet the above criteria, including all nodules <1 cm  
F. FNA is not required for purely cystic nodules