A middle aged female presents with slowly progressive weakness of lower limbs, spasticity and recent onset hesitancy of Micturition. On neurological examination there is evidence of dorsal myelopathy. MRI scan of spine reveals middorsal intradural contrast enhancing mass lesion. Diagnosis is:

Radiology

A middle aged female presents with slowly progressive weakness of lower limbs, spasticity and recent onset hesitancy of Micturition. On neurological examination there is evidence of dorsal myelopathy. MRI scan of spine reveals middorsal intradural contrast enhancing mass lesion. Diagnosis is:

All of the following form radiolucent stones except:

The usual radiographic appearance of an osteosarcoma is:

Best noninvasive investigation to check for bility of myocardium is: