ANTI LKM (LIVER KIDNEY MICROSOMAL) ANTIBODIES - EIA

The Anti-LKM (Liver Kidney Microsomal) Antibodies Test by Enzyme Immunoassay (EIA) is a specialized blood test used to detect Anti-Liver Kidney Microsomal (Anti-LKM) antibodies, which are autoantibodies directed against proteins found in liver and kidney cells. This test is primarily used to help diagnose Autoimmune Hepatitis (AIH), particularly Type 2 Autoimmune Hepatitis, and to evaluate other autoimmune liver disorders.

Autoimmune hepatitis is a chronic inflammatory liver disease in which the body's immune system mistakenly attacks healthy liver cells, causing persistent inflammation and progressive liver damage. Without early diagnosis and appropriate treatment, the disease may progress to liver fibrosis, cirrhosis, or liver failure.

The Anti-LKM Antibody Test is commonly performed alongside other autoimmune liver markers such as Anti-Nuclear Antibodies (ANA), Anti-Smooth Muscle Antibodies (ASMA), Anti-Liver Cytosol (LC-1) antibodies, liver function tests (LFTs), and serum immunoglobulin levels to provide a comprehensive evaluation of autoimmune liver disease.

The EIA (Enzyme Immunoassay) method offers high sensitivity and specificity for detecting Anti-LKM antibodies, supporting accurate diagnosis and timely treatment.

Benefits of the Test

• Detects Anti-LKM autoantibodies with high accuracy
• Helps diagnose Type 2 Autoimmune Hepatitis
• Supports evaluation of autoimmune liver diseases
• Assists in differentiating autoimmune liver disorders
• Helps guide treatment and long-term monitoring
• Requires only a peripheral blood sample
• Supports early diagnosis before significant liver damage occurs

Why Doctors Recommend This Test

Doctors may recommend this test for individuals with:

• Unexplained elevation of liver enzymes
• Chronic hepatitis
• Persistent fatigue
• Yellowing of the skin or eyes (jaundice)
• Abdominal discomfort
• Dark-colored urine
• Enlarged liver
• Suspected autoimmune hepatitis
• Family history of autoimmune liver disease
• Abnormal liver function test results

Preparation Before Test

Sample Required

• Peripheral venous blood sample (Serum)

Preparation Guidelines

• No fasting is generally required.
• Continue medications unless advised otherwise by your physician.
• Inform your healthcare provider about any liver disease, autoimmune disorders, or ongoing medications.
• Follow laboratory instructions before sample collection.

Reporting Time

Results are generally available within 3–7 working days, depending on laboratory methodology.

Who Should Take This Test?

This test is recommended for:

• Individuals with suspected autoimmune hepatitis
• Patients with unexplained abnormal liver function tests
• Individuals with chronic liver inflammation
• Children and young adults suspected of Type 2 Autoimmune Hepatitis
• Patients with autoimmune disorders affecting the liver
• Individuals referred by hepatologists, gastroenterologists, or immunologists

Clinical Significance

A positive Anti-LKM antibody result may indicate:

• Type 2 Autoimmune Hepatitis
• Autoimmune Liver Disease
• Chronic Autoimmune Hepatitis
• Immune-Mediated Liver Inflammation

Common symptoms associated with autoimmune hepatitis include:

• Persistent fatigue
• Jaundice
• Loss of appetite
• Nausea
• Abdominal discomfort
• Joint pain
• Dark urine
• Pale stools
• Itchy skin
• Enlarged liver

Although Anti-LKM antibodies are strongly associated with Type 2 Autoimmune Hepatitis, results should always be interpreted alongside clinical findings, liver function tests, serum IgG levels, ANA, ASMA, LC-1 antibodies, imaging studies, and, when appropriate, a liver biopsy.