Atypical Endobronchial Carcinoid with Postobstructive Pneumonia Obscuring the Diagnosis of Granulomatosis with Polyangiitis

Table 2

ACR classification criteria for granulomatosis with polyangiitis (formerly, Wegener’s Granulomatosis).

Classification criteria
(1) Nasal or oral inflammation	Painful or painless oral ulcers or purulent or bloody nasal discharge
(2) Abnormal chest radiograph	Pulmonary nodules, fixed pulmonary infiltrates, or pulmonary cavities
(3) Abnormal urinary sediment	Microscopic hematuria with or without red cell casts
(4) Granulomatous inflammation	Biopsy of an artery or perivascular area shows granulomatous inflammation

The presence of two or more of these four criteria yields a sensitivity of 88 percent.
The presence of two or more of these four criteria yields a specificity of 92 percent.