| Muscle biopsy | |
|---|---|
 Micrograph of a muscle biopsy showing ragged red fibers, a finding seen in various types of mitochondrial diseases. Gomori trichrome stain. | |
| ICD-9 | 15.01 |
In medicine, a muscle biopsy is a procedure in which a piece of muscle tissue is removed from an organism and examined microscopically. A muscle biopsy can lead to the discovery of problems with the nervous system, connective tissue, vascular system, or musculoskeletal system.