Diagnosis
Because of the vagueness of early symptoms and rapid progression of the disease, diagnosis is often not reached until very late in the course of the disease. A kidney biopsy (linear IgG deposits along basement membrane) is often the fastest way to secure the diagnosis and gain information about the extent of the disease and likely effect of treatment. Tests for anti-GBM antibodies may also be useful, combined with tests for antibodies to neutrophil cytoplasmic antigens, which are also directed against the patient’s own proteins.
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