A muscle biopsy procedure is performed in order to take a closer look at muscle fibers for the definitive diagnosis of conditions such as myopathy, myositis, muscular dystrophy and motor nerve or motor neuron disorder. This is done under local anesthesia as an outpatient minor surgery procedure at the Brigham & Women’s Hospital first floor Ambulatory Treatment Room (ATR). Typical sites include the deltoid muscle, biceps muscle and quadriceps muscle.

You may eat and drink as usual on the day of the procedure, and it is preferable that you bring someone with you to drive if necessary. Post-operative wound check is usually done in 10-14 days. Results typically take 2-8 weeks to return and will be reviewed with you at a separate follow up appointment.