Goodpasture Syndrome

Goodpasture syndrome is a rare autoimmune disorder that attacks your lungs and kidneys. Your immune system mistakenly creates antibodies against the glomerular basement membrane, a thin layer of tissue in your kidneys and lungs. These antibodies damage tiny blood vessels in both organs, leading to serious health problems.

This condition causes two main issues. First, it leads to glomerulonephritis, which is inflammation of the kidney's filtering units. Second, it causes pulmonary hemorrhage, which means bleeding in the lungs. Both problems can develop quickly and require immediate medical attention.

Goodpasture syndrome affects about 1 in 1 million people per year. It most commonly appears in young men in their 20s or older adults in their 60s and 70s. Without treatment, this condition can lead to kidney failure and life-threatening lung bleeding.

• Coughing up blood, which may range from small streaks to large amounts
• Shortness of breath or difficulty breathing
• Fatigue and weakness that gets worse over time
• Chest pain or tightness
• Pale skin from anemia caused by blood loss
• Foamy or bloody urine
• Swelling in the legs, feet, or ankles
• High blood pressure
• Nausea and vomiting
• Decreased urine output

Some people may notice kidney problems before lung symptoms appear. Early kidney damage can be silent, with no obvious symptoms until the disease progresses. Lung symptoms tend to be more noticeable and often bring people to seek medical care first.

Goodpasture syndrome happens when your immune system creates antibodies that attack a specific protein in your basement membranes. Doctors call these anti-glomerular basement membrane antibodies or anti-GBM antibodies. The exact trigger that causes your immune system to make these harmful antibodies remains unknown. Genetics may play a role, as certain genes make some people more susceptible to autoimmune disorders.

Environmental factors can trigger the disease in people who are already at risk. Smoking cigarettes is the strongest known risk factor and can worsen lung damage. Exposure to hydrocarbon solvents, certain chemicals, or metal dust may also trigger the condition. Respiratory infections, including flu or other viral illnesses, sometimes appear before symptoms start. Young men and older adults of both sexes face higher risk than other groups.

Diagnosing Goodpasture syndrome requires specialized testing that looks for anti-GBM antibodies in your blood. Indirect immunofluorescence is one blood test that can detect these circulating IgG antibodies. Doctors also use ELISA tests to measure antibody levels directly. A kidney biopsy provides the most definitive diagnosis by showing antibody deposits along the basement membrane in a specific pattern.

Your doctor will also order urine tests to check for blood and protein, which indicate kidney damage. Chest X-rays or CT scans can reveal bleeding or inflammation in your lungs. Pulmonary function tests measure how well your lungs are working. These specialized tests go beyond routine blood work. Talk to your doctor about testing if you have symptoms of lung or kidney problems.

• Plasmapheresis, a procedure that removes harmful antibodies from your blood
• Corticosteroids like prednisone to reduce immune system activity and inflammation
• Immunosuppressant medications such as cyclophosphamide or rituximab to stop antibody production
• Dialysis if kidney function becomes severely impaired
• Kidney transplant in cases of permanent kidney failure, usually after antibodies are gone
• Oxygen therapy or ventilator support for serious lung bleeding
• Blood transfusions if anemia becomes severe from blood loss
• Stopping smoking immediately to prevent further lung damage
• Avoiding exposure to chemicals, solvents, and other lung irritants
• Close monitoring of kidney function and antibody levels during and after treatment