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Anti-MDA5 Antibody (Screen)

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

This test checks for antibodies against the MDA5 protein, which may be linked to certain types of inflammatory or autoimmune conditions affecting the lungs or skin.

Quick summary

["This screening helps identify possible rare inflammatory diseases that can cause lung or skin symptoms."]

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

Key facts at a glance

LOINC
110186-4
Short code
MDA5 Ab Msmt Ser
Synonyms
MDA5 Ab Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

What Is This Test Measuring?

The test detects the presence of antibodies directed against the MDA5 protein, a molecule involved in immune responses. These antibodies may signal an autoimmune reaction that can cause conditions like dermatomyositis or pulmonary interstitial fibrosis.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms such as rash, muscle weakness, or breathing difficulties that suggest an underlying inflammatory or autoimmune condition linked to MDA5 antibodies.

What Does a Positive Result Mean?

A positive result indicates the presence of anti-MDA5 antibodies, which could support a diagnosis of conditions like dermatomyositis or other rare inflammatory diseases. Further testing and evaluation by a specialist may be needed to confirm the diagnosis and guide treatment.

What Does a Negative Result Mean?

A negative result means no detectable antibodies against MDA5 were found in this sample. However, this does not rule out other possible causes of your symptoms, so ongoing evaluation with your healthcare provider is important.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Anti-MDA5 (Screen)

Frequently asked questions

Could my test results affect my treatment plan?
Yes, if your results are positive, your healthcare provider may recommend additional testing or specialized care to manage symptoms and prevent complications. Treatment often focuses on controlling inflammation and supporting lung or skin health.
What symptoms might this test help diagnose?
This test is primarily used to identify conditions like dermatomyositis (a type of muscle inflammation) or pulmonary interstitial fibrosis (lung scarring). Symptoms may include rash, muscle pain, weakness, or breathing difficulties.
How often should I get this test?
The frequency depends on your symptoms and medical history. Your healthcare provider will determine if retesting is needed, especially if your condition changes or worsens.
  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