Liver Kidney Microsomal Antibodies
Private LKM Antibodies blood test in London for £88, measuring one autoimmune liver marker with results expected in around 2 business days.
Turnaround time
2 business days
Biomarkers count
1
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Overview of the Liver Kidney Microsomal Antibodies
The Liver Kidney Microsomal Antibodies blood test detects autoantibodies directed against liver-kidney microsomal antigens, commonly abbreviated to LKM antibodies.
The test contains 1 biomarker: Liver Kidney Microsomal Antibodies.
LKM antibodies are principally used during investigation of autoimmune hepatitis, a condition in which the immune system targets liver tissue and causes inflammation.
The most clinically recognised pattern is LKM-1, which is particularly associated with autoimmune hepatitis type 2.
Autoimmune hepatitis can affect both children and adults, although the distribution of specific autoantibody patterns differs between patient groups.
LKM antibodies are not interpreted in isolation.
A person with suspected autoimmune hepatitis will usually also have Liver Function Tests, Immunoglobulin G and additional autoantibody testing considered.
Other relevant antibodies may include Smooth Muscle Antibodies, Antinuclear Antibodies and Liver Cytosol antibodies, depending on the clinical picture.
A positive LKM result supports an autoimmune liver-disease assessment but does not independently prove autoimmune hepatitis.
Likewise, a negative LKM result does not rule out autoimmune hepatitis because many people with autoimmune hepatitis have different antibody profiles.
LKM antibodies have also been described in other clinical contexts, meaning that the antibody finding must be considered alongside liver enzymes, immunoglobulin concentrations, medication history, viral hepatitis testing and, where required, liver imaging or biopsy.
The purpose of the test is therefore to provide one important piece of evidence within a broader hepatology investigation.
What Does the Liver Kidney Microsomal Antibodies Test Check?
This test measures 1 biomarker.
Liver Kidney Microsomal Antibodies
Detects LKM autoantibodies associated particularly with autoimmune hepatitis type 2 and supports investigation of autoimmune liver inflammation.
Who May Benefit From the Liver Kidney Microsomal Antibodies Test?
LKM testing may be useful when autoimmune liver disease is suspected from symptoms, liver blood tests or other autoimmune findings.
People with persistently elevated liver enzymes without an established cause - Autoimmune hepatitis may form part of the differential diagnosis.
People undergoing investigation for autoimmune hepatitis - LKM antibodies are one recognised autoantibody associated with the disease.
Children or younger people with unexplained hepatitis - Type 2 autoimmune hepatitis and LKM antibodies are particularly relevant in younger populations.
People with high Immunoglobulin G and abnormal liver enzymes - This pattern can increase suspicion of autoimmune hepatitis.
People with negative Smooth Muscle or Antinuclear Antibodies but continued clinical suspicion - Different autoimmune hepatitis patterns can involve different autoantibodies.
People with another autoimmune condition and unexplained liver abnormalities - Autoimmune diseases can coexist.
People with a previous positive or borderline LKM antibody result - Repeat or complementary testing may help clarify the finding.
People referred by a hepatologist or gastroenterologist for autoimmune liver testing - LKM can contribute to a structured liver-autoantibody assessment.
How to Prepare
Do not stop immunosuppressive or other prescribed treatment simply to change an antibody result.
LKM antibodies are most useful when interpreted alongside the full biochemical and autoimmune liver profile.
Symptoms and Reasons to Consider the Liver Kidney Microsomal Antibodies Test
Autoimmune hepatitis can range from completely asymptomatic liver-enzyme abnormalities to clinically significant hepatitis.
Persistent unexplained fatigue - Fatigue can occur in autoimmune hepatitis but is highly non-specific.
Abnormal ALT or AST without a clear explanation - Persistent hepatocellular enzyme elevations can prompt autoimmune testing.
Yellowing of the skin or eyes - Jaundice can occur in more active liver inflammation.
Dark urine - Increased Bilirubin can produce dark urine during significant hepatobiliary disease.
Upper abdominal discomfort - Some people experience non-specific right-sided abdominal discomfort.
Unexplained nausea or reduced appetite - These symptoms may accompany hepatitis but are not specific.
Joint aches with abnormal liver tests - Systemic autoimmune features can occasionally accompany autoimmune hepatitis.
Another autoimmune condition with new liver-test abnormalities - The coexistence of autoimmune disease can make an autoimmune liver process more relevant.
A previous positive LKM result requiring confirmation or wider assessment - Additional liver markers can help establish the significance.
These symptoms are not specific to autoimmune hepatitis.
Jaundice, marked weakness, persistent vomiting, confusion, easy bleeding or rapidly worsening liver abnormalities require prompt medical assessment.
How to Book Your Liver Kidney Microsomal Antibodies Test
Booking your LKM antibody test with London Blood Tests is straightforward.
Choose the Liver Kidney Microsomal Antibodies
Select the individual LKM antibody blood test.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy depending on location and availability.
Attend your appointment
A trained healthcare professional collects the required venous blood sample.
Laboratory analysis
Your serum undergoes specialist immunology analysis for Liver Kidney Microsomal Antibodies.
Receive your results securely
Your authorised autoimmune liver antibody result is delivered securely for interpretation with your wider liver investigations.
When Will I Receive My Results?
The expected specialist laboratory turnaround for Liver Kidney Microsomal Antibodies is approximately 2 business days after your sample reaches the laboratory.
This is a specialist immunology test rather than a routine liver-enzyme measurement, although the current laboratory schedule allows relatively rapid processing.
Your specimen must undergo antibody analysis, quality-control review and laboratory authorisation before the result is released.
Turnaround begins from laboratory receipt rather than necessarily from the time of collection.
If LKM testing is ordered together with a broader autoimmune liver profile, Liver Immunoblot or other specialist antibodies, some accompanying investigations may have different reporting times.
Understanding Your Results
A negative LKM antibody result means that the antibody pattern targeted by the assay was not detected.
This makes LKM-associated autoimmune hepatitis less likely but does not exclude autoimmune hepatitis overall.
Many people with autoimmune hepatitis have other antibody patterns, such as Smooth Muscle or Antinuclear Antibodies.
A positive LKM antibody result supports the possibility of autoimmune liver disease, particularly autoimmune hepatitis type 2 when the clinical and biochemical context is compatible.
However, the antibody result is not sufficient for diagnosis by itself.
Interpretation generally considers the ALT, AST, Bilirubin, Immunoglobulin G, other autoantibodies, viral hepatitis status and clinical presentation.
In selected cases, imaging or liver biopsy may be necessary to establish the diagnosis and assess the degree of inflammation or fibrosis.
An antibody result should therefore guide further clinical assessment rather than be interpreted as an isolated diagnosis.
Why Book With London Blood Tests?
Private autoimmune liver testing in London - Access targeted LKM antibody measurement privately.
Relevant to autoimmune hepatitis - LKM antibodies are an established marker associated particularly with autoimmune hepatitis type 2.
Useful alongside other liver antibodies - Results can complement Smooth Muscle, ANA and other autoimmune liver investigations.
Suitable after unexplained abnormal LFTs - LKM testing may contribute when persistent liver-enzyme changes remain unexplained.
Specialist immunology analysis - Your sample undergoes dedicated autoantibody testing.
Fast specialist turnaround - Results are expected approximately 2 business days after laboratory receipt.
Secure reporting - Receive your authorised result securely.
Clear pricing - Liver Kidney Microsomal Antibodies testing costs £88.
Private Liver Kidney Microsomal Antibodies Blood Test in London
London Blood Tests provides private Liver Kidney Microsomal Antibodies testing in London for people requiring specialist assessment of possible autoimmune liver disease.
The test costs £88 and measures one biomarker: Liver Kidney Microsomal Antibodies.
Results are expected approximately 2 business days after laboratory receipt.
A positive result supports further autoimmune hepatitis assessment but does not establish the diagnosis by itself.