From: Causes of misdiagnoses by thyroid fine-needle aspiration cytology (FNAC): our experience and a systematic review
Analysis
Number
Suboptional specimen
 Thyroiditis
6
 Goiter with diffuse fibrosis
2
 PTMC
1
Interpretation error
 Cystic lesions
9
12
 Adenomatous hyperplasia
17
Total
47