Diagnosis of Goodpasture Syndrome
A health care provider may order the following tests to diagnose Goodpasture syndrome:

Urinalysis. Urinalysis is testing of a urine sample. The urine sample is collected in a special container in a health care provider’s office or commercial facility and can be tested in the same location or sent to a lab for analysis. For the test, a nurse or technician places a strip of chemically treated paper, called a dipstick, into the urine. Patches on the dipstick change color when protein or blood are present in urine. A high number of red blood cells and high levels of protein in the urine indicate kidney damage.
Blood test. A blood test involves drawing blood at a health care provider’s office or commercial facility and sending the sample to a lab for analysis. The blood test can show the presence of anti-GBM antibodies.

Chest x-ray. An x-ray of the chest is performed in a health care provider’s office, outpatient center, or hospital by an x-ray technician, and the images are interpreted by a radiologist-a doctor who specializes in medical imaging. Abnormalities in the lungs, if present, can be seen on the x-ray.

Biopsy. A biopsy is a procedure that involves taking a piece of kidney tissue for examination with a microscope. The biopsy is performed by a health care provider in a hospital with light sedation and local anesthetic. The health care provider uses imaging techniques such as ultrasound or a computerized tomography scan to guide the biopsy needle into the kidney. The tissue is examined in a lab by a pathologist-a doctor who specializes in diagnosing diseases. The test can show crescent-shaped changes in the glomeruli and lines of antibodies attached to the GBM.