Investigations stipulated to exclude other conditions
| CK, creatine kinase; ANF, antinuclear factor. | |
| Rheumatoid arthritis | Rheumatoid factor, x ray of hands, possibly feet, and any other affected joint |
| Capsulitis of shoulder | Full examination of shoulder with clinical history |
| Cervical spondylosis | Clinical history, x ray of cervical spine |
| Osteoarthritis of shoulder | x Ray |
| Polymyositis | CK, electromyography where clinically indicated |
| Thyrotoxicosis | Thyroid function test |
| Myopathies | Clinical examination, compatible electromyography |
| Systemic lupus erythematosus | ANF, DNA binding |
| Polyarteritis nodosa | Clinical picture |
| Dermatomyositis | Clinical picture, CK |
| Multiple myeloma | Serum and urine electrophoresis |
| Occult carcinoma | Careful clinical history, chest x ray, occult bloods |
| Parkinson’s disease | Clinical history and clinical signs |