Differential diagnoses for these conditions include:
- Cervical disc disease
- Brachial plexus abnormalities, thoracic outlet syndrome, pancoast tumour
- Elbow abnormalities, epicondylitis
- Infections, tumours, diabetes mellitus, hypothyroidism, rheumatoid diseases and alcoholism
- Wrist fractures
- Ulnar artery aneurysms or thrombosis at the wrist