Abstract
Granulomatosis with polyangiitis (GPA) was diagnosed in a patient with a 16-month history of IgG4-related lung disease that spontaneously became asymptomatic. Cytoplasmic antineutrophil cytoplasmic antibody (ANCA) was positive at the time of diagnosis of IgG4-related disease (IgG4-RD), but there was no vasculitis or kidney disease. Sixteen months later he developed rapidly progressive glomerulonephritis that responded to cyclophosphamide treatment. While undergoing treatment for GPA, he was found to have a lung mass identified as small cell lung cancer. This mass was present at the time of the IgG4-RD diagnosis. GPA can be confused with IgG4-RD histologically and they rarely coexist. ANCA antibodies are primarily IgG4 subclass. IgG4-RD has been associated with cancer and may improve prognosis. We speculate that this patient may have had small cell lung cancer that incited an IgG4 predominant immune response with coexistent ANCA antibodies that eventually resulted in GPA. Immunosuppressive treatment of GPA likely accelerated the progression of the lung cancer.
Reference19 articles.
1. Diagnosis and management of pulmonary vasculitis
2. Wegener’s granulomatosis: pitfalls in the management of pulmonary disease: A case of Wegener’s granulomatosis with a hilar mass;Jolly;J Rheumatol,2000
3. Gaskin G , Pusey CD . Systemic vasculitis. Davison AM , ed. Oxford textbook of clinical nephrology. Oxford: Oxford University Press, 1998.
4. Antineutrophil cytoplasmic antibodies and associated diseases: A review of the clinical and laboratory features
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