Table 1.

Reported cases of bucillamine-induced crescent formation

Year	Initial diagnosis	Clinical manifestation	IF study	EM study	ANCA	Outcome	Treatment	Reference
1993	RA	RPGN	negative	no EDD	negative	improved	prednisolone, cyclophosphamide	13
1993	RA	NS without hematuria	negative	mesangial EDD	NR	improved	prednisolone	14
2012	RA	RPGN, NS	IgG, C3, C1q	subepithelial EDD	negative	improved	prednisolone, cyclophosphamide	present case

RA = Rheumatoid arthritis; EDD = electron-dense deposit; NR = not reported.