C8/T1 nerve root lesion
Medial cord brachial plexus lesion
Diabetic<unk> 
Amyloidosis
Peripheral nerve tumor
Carpal tunnel syndrome
Pronator teres syndrome
Anterior interosseous<unk> <unk> 
Radial<unk>  at the spiral groove (ie. "Saturday night palsy")
Posterior interosseous<unk> 
Suprascapular<unk> 
Long thoracic<unk> 
Axillary<unk> 
Spinal accessory<unk> 
Musculocutaneous<unk> 
Brachial plexopathy
Parsonage-Turner syndrome
Cervical radiculopathy
Parsonage-Turner syndrome
Ulnar neuropathy
C8/T1 nerve root lesion
Anterior interosseous neuropathy
Medial cord brachial plexus lesion
Long thoracic neuropathy
Diabetic neuropathy
Posterior interosseous neuropathy
Amyloidosis