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Table 1 Diagnostic criteria for confirmation of GPA according to the American College of Rheumatology

From: Breast involvement in granulomatosis with polyangiitis: a case report

Criteria Characteristics
Nasal or oral inflammation Painful or painless oral ulcers, purulent or bloody nasal discharge
Abnormal chest radiograph Nodules, fixed infiltrates, cavities
Urinary sediment Microhematuria (>‚ÄČ5 RBCs per high power field), red cell cast
Granulomatous inflammation at biopsy Involvement of the wall of an artery/ arteriole, involvement of the perivascular / extravascular spaces