A 20-year-old man has insidious weakness and wasting of one hand and forearm, sparing brachioradialis, with no sensory loss or upper-motor-neuron sign...

Question

A 20-year-old man has insidious weakness and wasting of one hand and forearm, sparing brachioradialis, with no sensory loss or upper-motor-neuron signs. Symptoms worsened for three years and have now stabilised. Routine neutral-position cervical MRI is unrevealing. Which investigation is most informative?

Accepted Answer

Cervical MRI during neck flexion

Answer

MRI of the brachial plexus after gadolinium

Answer

CT myelography in a neutral neck position

Answer

Median and ulnar somatosensory evoked potentials

Answer

Muscle MRI after repetitive hand exercise

Statin intensity — MRCP Part 1 MCQ