A 14 year old obese child is referred from an endocrinologist for painful limping of hip.Which of the following investigation is least useful in this clinical setting?

Radiology

A 14 year old obese child is referred from an endocrinologist for painful limping of hip.Which of the following investigation is least useful in this clinical setting?

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,…