Myopathic
| Myopathy | |
|---|---|
| Specialty | Rheumatology |
| Classification | |
|---|---|
| External resources |
Myopathy is a disease of muscle in which the muscle fibers do not function properly. This results in muscular weakness. "Myopathy" simply means muscle disease (Greek myo- "muscle" + patheia < -pathy "suffering"). This meaning implies that the primary defect is within the muscle, as opposed to the nerves ("neuropathies" or "neurogenic" disorders) or elsewhere (e.g., the brain). Muscle cramps, stiffness, and spasm can also be associated with myopathy.
Muscular disease can be classified as neuromuscular or musculoskeletal in nature. Some conditions, such as myositis, can be considered both neuromuscular and musculoskeletal.
Common symptoms include muscle weakness, cramps, stiffness, and tetany.
Myopathies in systemic disease results from several different disease processes including endocrine, inflammatory, paraneoplastic, infectious, drug- and toxin-induced, critical illness myopathy, metabolic, collagen related, and myopathies with other systemic disorders. Patients with systemic myopathies often present acutely or sub acutely. On the other hand, familial myopathies or dystrophies generally present in a chronic fashion with exceptions of metabolic myopathies where symptoms on occasion can be precipitated acutely. Most of the inflammatory myopathies can have a chance association with malignant lesions; the incidence appears to be specifically increased only in patients with dermatomyositis.
There are many types of myopathy. ICD-10 codes are provided here where available.
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