[A case of ANCA-associated rapidly progressive glomerulonephritis with oral aphtha and erythema nodosum].

We reported a case of a 22-year old female with a microscopic form of polyarteritis nodosa (PN) who initially manifested Behçet's disease-like symptoms, such as fever, arthralgia, oral aphtha and erythema nodosum, and rapidly progressive glomerulonephritis (RPGN). On admission, her urinalysis showed active nephritic syndrome and her renal function rapidly deteriorated; serum creatinine levels elevated from 1.2 to 3.