Which of the following feature of a thyroid nodule on ultrasonogram is not suggestive of malignancy?

Radiology

Which of the following feature of a thyroid nodule on ultrasonogram is not suggestive of malignancy?

All of the following form radiolucent stones except:

The usual radiographic appearance of an osteosarcoma is:

A middle aged female presents with slowly progressive weakness of lower limbs,…