21. 下列有關Wegener's granulomatosis之敘述,何者為誤:
(A) It is male predominant.
(B) Lung involvement appears as multiple nodular cavitary infiltrates.
(C) Purulent or bloody nasal discharge is common.
(D) A rapidly progressive crescentic glomerulonephritis is observed.
(E) Most effective treatment is cyclophosphamide together with glucocorticoids.