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Muscle Deep Biopsy (Histological Examination)

Published: August 9, 2026Updated: August 16, 2026

A small sample of muscle tissue is taken from your body for microscopic examination to check for abnormalities, such as inflammation, nerve damage, or other conditions affecting muscle function.

Quick summary

["This test helps diagnose muscle diseases by examining tissue structure under a microscope."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
44109-7
Short code
CT Guided Muscle Deep Bx
Synonyms
CT Guided Muscle Deep Bx
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may recommend a muscle biopsy if you have symptoms like unexplained muscle weakness, pain, or fatigue that don’t improve with other treatments. It can also be used to investigate inherited muscle disorders or conditions linked to nerve or muscle dysfunction.

What Happens During the Procedure?

The test involves a small incision in your skin, usually in the thigh or calf. A needle or surgical tool is used to remove a tiny piece of muscle tissue. You may feel discomfort but not pain, and local anesthesia is often used to numb the area.

Preparation and Recovery

You may need to fast for a short time before the procedure, depending on your doctor’s instructions. Afterward, you’ll need to rest for a few hours, and you may experience mild bruising or soreness. Follow your doctor’s advice for recovery.

What Does the Test Show?

The tissue sample is sent to a lab where it is sliced into thin sections and examined under a microscope. Pathologists look for signs of muscle damage, inflammation, fat infiltration, or other abnormalities that may indicate a specific condition.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Muscle Biopsy

Frequently asked questions

What are the risks or side effects of a muscle biopsy?
The most common side effects include bruising, soreness, or a small wound at the biopsy site. Rarely, there may be infection or bleeding. Most people recover quickly with proper care.
How long does it take to get results from a muscle biopsy?
Results typically take several days to a couple of weeks, depending on the lab and the complexity of the analysis. Your doctor will discuss the findings with you once they are ready.
Can I eat or drink normally before the biopsy?
Follow your doctor’s specific instructions, but generally, you may eat and drink as usual unless advised otherwise. Some centers may recommend fasting for a short period before the procedure.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy