Which of the following feature of a thyroid nodule on ultrasonogram is not suggestive of malignancy?: (A) Hyperechogenisity, (B) Hypoechogenisity, (C) Nonhomogenous, (D) Microcalcification
Answer is A. The hyperechoic structure on ultrasonography suggests a benign lesion. Malignancies always have a hypoechoic or nonhomogeneous hypoechoic structure.
USG features of malignancy in a thyroid nodule

Hypoechoic / nonhomogeneous / solid                
Microcalcification                                                  
Variable peripheral rim
Internal vascularity
Lymph node involvement