Malignant cold nodule in thyroid diagnostic on USG by all EXCEPT: (A) No cystic lesion, (B) Irregular margins, (C) Calcification at margin of tumour, (D) Hypoechoic
Answer is A. (A) No cystic lesion > USG can also be used to aid in the differentiation between benign and malignant nodules. The following criteria can be used by USG, and favor a diagnosis of malignancy:1) Absence of a halo sign2) Uniformly solid tumor with occasional central necrosis3) Irregular margins4) Fine calcifications5) Heterogenous echos and large size6) Surrounding tissue invasion