Proximal myopathy
| Incidental findings | Stigmata steroid usage |
| +ve signs | Proximal muscle weakness, difficulty standing from chair / from squatting |
| Differential diagnosis | As below |
| Function | ?Disabled |
| Tests |
CK, EMG TFTs Vitamin D |
Causes
Endocrine: Cushing’s, Thyrotoxicosis
Inflammatory: Polymyositis/dermatomyositis
Osteomalacia
Carcinomatous
Endocrine: Cushing’s, Thyrotoxicosis
Inflammatory: Polymyositis/dermatomyositis
Osteomalacia
Carcinomatous
Notes
- PMR causes proximal stiffness, tenderness but muscle strength near normal
- Other causes: McArdle’s, mitochondiral myopathy, uraemia